Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key

The solutions to Bridges in Mathematics Grade 3 Student Book Answer Key Unit 6 Module 2 can help students to clear their doubts quickly.

Bridges in Mathematics Grade 3 Student Book Answer Key Unit 6 Module 2

Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Session 1 Answer Key

Polygons & Time

Question 1.
Two of the shapes below are rhombuses, and two are not. Circle the two rhombuses.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 1
Answer:
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key-23
Explanation:
Rhombus is quadrilateral in which all the four sides are equal.

Question 2.
Circle the two irregular polygons.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 2
Answer:
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key-24
Explanation:
A polygon is irregular when its sides are not equal to each other and the measure of angles may also be unequal.

Question 3.
Write the time shown on each clock.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 3
Answer:
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key-42

Question 4.
Ava boards her school bus at 7:48 in the morning. She arrives at school at 8:07. How long does it take Ava to get to school? Show your work.
Answer:
Time taken by Ava to get to school = 19 minutes.
Explanation:
Ava boards her school at 7:48 a.m.
Ava reaches school at 8:07 a.m.
Convert 7:48 a.m. into minutes.
7 × 60 + 48 = 420 + 48 = 468 minutes.
Convert 8:07 a.m. into minutes.
8 × 60 + 7 = 480 + 7 = 487 minutes.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key-43
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Session 2 Answer Key

Work Place Instructions 6B Geoboard Polygons

Each student works alone and needs:

  • 6B Geoboard Polygons Record Sheet (1 of 3 pages)
  • geoboard and bands
  • ruler

1. Students choose one of the three pages of record sheets to work on, and record their name at the top of the page.

2. Students read the polygon descriptions and build at least one example of each kind of polygon on their geoboard.

3. Students copy their favorite example of each polygon on the record sheet, using a ruler to draw straight sides.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 4
4. Students check to make sure their drawing matches the polygon built on the geoboard before going on to the next polygon.

5. Once students have completed a page, they can pair up with another student who has also finished and compare their polygons.

  • Do students agree that each other’s polygons fit the descriptions given on the sheet?
  • If both students have built a polygon for the same descriptions, how are the polygons alike and different?

Game Variations
A. If some students have trouble building and describing their own polygons, invite them to build the polygons with a partner first and then describe them in collaboration.

B. Students who are ready to work at a more challenging level might enjoy working in pairs, coming up with descriptions first and then challenging their partners to build polygons that match those descriptions.
Answer:
The polygons of any two students can be alike or different,
Explanation:
As the students check each polygon after completion of drawing, some students find the same polygon but of different sizes in the case of rhombus and trapezium (the third and fourth images on geoboard) while the second image of a polygon with no parallel sides vary for each student.

Geoboard Polygons

Question 1.
On each geoboard below, draw an example of the polygon named.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 5
Answer:
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key-4
Explanation:
A square is a quadrilateral in which all sides are equal and also angles are equal.
A rectangle is a quadrilateral in which a pair of opposite sides are parallel.
A rhombus is a quadrilateral in which all sides are equal and all angles are not equal.

Question 2.
Fill in every bubble beside a statement that is true about all three of the polygons you drew in problem 1.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 6 All three of the polygons are quadrilaterals.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 6 All three of the polygons have 4 sides that are congruent.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 6 All three of the polygons are parallelograms.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 6 All three of the polygons have 2 pairs of parallel sides.
Answer:
Statements that are true:
All three of the polygons are quadrilaterals.
All three of the polygons are parallelograms.
All three of the polygons have 2 pairs of parallel sides.

Question 3.
Multiply.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 7
Answer:
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key-5
Explanation:
By mental computation,
As the number to be added is 4 and the integral number value is 3, so to find the value we need to add 4 for 3 times, 4 × 3 = 4 + 4 + 4 = 12, hence 4 × 3 = 12.

By mental computation,
As the number to be added is 2 and the integral number value is 7, so to find the value we need to add 2 for 7 times, 2 × 7 = 2 + 2 + 2 + 2 + 2 + 2 + 2 = 14, hence 2 × 7 = 14.

By mental computation,
As the number to be added is 4 and the integral number value is 4, so to find the value we need to add 4 for 4 times, 4 × 4 = 4 + 4 + 4 + 4 = 16, hence 4 × 4 = 16.

By mental computation,
As the number to be added is 7 and the integral number value is 5, so to find the value we need to add 7 for 5 times, 7 × 5 = 7 + 7 + 7 + 7 + 7 = 35, hence 7 × 5 = 35.

By mental computation,
As the number to be added is 6 and the integral number value is 4, so to find the value we need to add 6 for 4 times, 6 × 4 = 6 + 6 + 6 + 6 = 24, hence 6 × 4 = 24.

By mental computation,
As the number to be added is 3 and the integral number value is 9, so to find the value we need to add 3 for 9 times, 3 × 9 = 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 = 27, hence 3 × 9 = 27.

By mental computation,
As the number to be added is 8 and the integral number value is 8, so to find the value we need to add 8 for 8 times, 8 × 8 = 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = 64, hence 8 × 8 = 64.

By mental computation,
As the number to be added is 3 and the integral number value is 3, so to find the value we need to add 3 for 3 times, 3 × 3 = 3 + 3 + 3 = 9, hence 3 × 3 = 9.

By mental computation,
As the number to be added is 8 and the integral number value is 7, so to find the value we need to add 8 for 7 times, 8 × 7 = 8 + 8 + 8 + 8 + 8 + 8 + 8 = 56, hence 8 × 7 = 56.

By mental computation,
As the number to be added is 9 and the integral number value is 4, so to find the value we need to add 9 for 4 times, 9 × 4 = 9 + 9 + 9 + 9 = 36, hence 9 × 4 = 36.

Step 1: Multiply the integral value 8 with the number in ones place, any number multiplied by 0 gives the product as 0, hence 8 × 0 = 0.
Step 2: Multiply the integral value 8 with the number in tens place, any number multiplied by 1 gives the same number itself, hence 8 × 1 = 8.
Therefore, 10 × 8 = 80.

By mental computation,
As the number to be added is 8 and the integral number value is 4, so to find the value we need to add 8 for 4 times, 8 × 4 = 8 + 8 + 8 + 8 = 32, hence 8 × 4 = 32.

Step 1: Multiply the integral value 9 with the number in ones place, any number multiplied by 0 gives the product as 0, hence 9 × 0 = 0.
Step 2: Multiply the integral value 9 with the number in tens place, any number multiplied by 1 gives the same number itself, hence 9 × 1 = 9.
Therefore, 10 × 9 = 90.

By mental computation,
As the number to be added is 6 and the integral number value is 8, so to find the value we need to add 6 for 8 times, 6 × 8 = 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 = 48, hence 6 × 8 = 48.

Question 4.
CHALLENGE Multiply.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 8
Answer:
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key-25
Explanation:
Step 1: Multiply the integral value 8 with the number in ones place, any number multiplied by 0 gives the product as 0, hence 8 × 0 = 0.
Step 2: Multiply the integral value 8 with the number in tens place hence 8 × 2 = 16.
Therefore, 20 × 8 = 160.

Step 1: Multiply the integral value 7 with the number in ones place, any number multiplied by 0 gives the product as 0, hence 7 × 0 = 0.
Step 2: Multiply the integral value 7 with the number in tens place hence 7 × 3 = 21.
Therefore, 30 × 7 = 210.

Step 1: Multiply the integral value 4 with the number in ones place, any number multiplied by 0 gives the product as 0, hence 4 × 0 = 0.
Step 2: Multiply the integral value 4 with the number in tens place hence 4 × 4 = 16.
Therefore, 40 × 4 = 160.

Step 1: Multiply the integral value 5 with the number in ones place, any number multiplied by 0 gives the product as 0, hence 5 × 0 = 0.
Step 2: Multiply the integral value 5 with the number in tens place hence 5 × 2 = 10.
Therefore, 20 × 5 = 100.

Step 1: Multiply the integral value 4 with the number in ones place, any number multiplied by 0 gives the product as 0, hence 4 × 0 = 0.
Step 2: Multiply the integral value 4 with the number in tens place hence 4 × 5 = 20.
Therefore, 50 × 4 = 200.

Step 1: Multiply the integral value 9 with the number in ones place, any number multiplied by 0 gives the product as 0, hence 9 × 0 = 0.
Step 2: Multiply the integral value 9 with the number in tens place hence 9 × 6 = 54.
Therefore, 60 × 9 = 540.

Step 1: Multiply the integral value 8 with the number in ones place, any number multiplied by 0 gives the product as 0, hence 8 × 0 = 0.
Step 2: Multiply the integral value 8 with the number in tens place hence 8 × 8 = 64.
Therefore, 80 × 8 = 640.

Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Session 3 Answer Key

Different Kinds of Quadrilaterals

A quadrilateral is a shape with 4 sides. Here are some different kinds of quadrilaterals.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 9

Question 1.
Circle the word(s) that describe each shape.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 10
trapezoid
parallelogram
rectangle
rhombus
square
Answer:
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key-26
Explanation:
Since the above above figure has two parallel lines and all angles are equal { measure 90 degrees }. So the above figure is a rectangle.

Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 11
trapezoid
parallelogram
rectangle
rhombus
square
Answer:
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key-27
Explanation:
Since two pairs of opposite sides are parallel and the angles are not equal. So the above figure is a parallelogram.

Question 2.
Jackie circled all these words for this shape. Is she right or wrong? Explain your answer.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 12
Answer:
Jackie is wrong,

Explanation:
Since all sides are equal and all angles are equal . So the given quadrilateral is a square.

Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Session 4 Answer Key

Name that Quadrilateral

Question 1.
Fill in the bubbles to show all the names that could be used to identify this shape.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 13
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 6 square
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 6 rhombus
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 6 quadrilateral
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 6 parallelogram
Answer:
The above quadrilateral is a rhombus.

Explanation:
Since all sides are equal and the angles are not equal. So the given quadrilateral is a rhombus.

Question 2.
Fill in the bubbles to show all the names that could be used to identify this shape.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 14
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 6 trapezoid
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 6 parallelogram
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 6 rectangle
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 6 quadrilateral
Answer:
The above quadrilateral is a trapezoid.

Explanation:
Since one pair of opposite sides are parallel. So the quadrilateral is trapezoid.

Question 3.
How do you know that the shape in problem 2 is not a parallelogram? Use labeled sketches or words to explain.
Answer:
The shape in problem 2 is not a parallelogram but a trapezoid.

Explanation:
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key-28
Figure 1 is trapezoid. A quadrilateral in which one pair of opposite sides are parallel.
Figure 2 is a parallelogram.  quadrilateral in which opposite sides are parallel.

Question 4.
Alejandro has a rock collection. His favorite rock has a mass of 123 grams. His next favorite rocks have masses of 188 grams and 209 grams. How much mass do Alejandro’s three favorite rocks have together? Show your work.
Answer:
Mass of his three favourite rocks together = 520 grams.

Explanation:
Mass of his first rock = 123 grams
Mass of his second rock = 188 grams
Mass of his third rock = 209 grams
Mass of his three favourite rocks together = 123 + 188 + 209 = 520 grams.

Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Session 5 Answer Key

Know Your Quadrilaterals

Question 1.
Draw a line from each description to every quadrilateral that has those attributes.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 15
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 15
Answer:
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key-6

Question 2.
Solve the following:
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 17
Answer:
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key-7

Question 3.
Complete the Mystery Number Line below.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 18
Answer:
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key-8

Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Session 6 Answer Key

Perimeter Record Sheet

Question 1.
Label each figure on the Paper Quadrilaterals sheet with its name.
Answer:
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key-48

Question 2.
Work with your partner to carefully cut out the 5 quadrilaterals. Then use your estimation skills to put them in order, from smallest to largest perimeter.
Answer:
Smallest to largest perimeter:
1.Rhombus perimeter ( 8 units )
2. Trapezoid perimeter ( 11 units )
3. Square ( 12 units )
4. Parallelogram ( 14 units )
5. Rectangle ( 18 units )
Explanation:
Bridges-in-Mathematics-Grade-3-Student-Book-Unit-6-Module-2-Answer-Key-49
Perimeter is the distance around the rectangle.
So the perimeter of the above figure is
Perimeter = Sum of all the sides
= 3 + 3 + 6 + 6 =18 units.
Bridges-in-Mathematics-Grade-3-Student-Book-Unit-6-Module-2-Answer-Key-50
Perimeter is the distance around the square.
So the perimeter of the above figure is
Perimeter = Sum of all the sides
= 3 + 3 + 3 + 3 =12 units.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key-51
Perimeter is the distance around the rhombus.
So the perimeter of the above figure is
Perimeter = Sum of all the sides
= 2 + 2 + 2 + 2 =8 units.
Bridges-in-Mathematics-Grade-3-Student-Book-Unit-6-Module-2-Answer-Key-52
Perimeter is the distance around the trapezoid.
So the perimeter of the above figure is
Perimeter = Sum of all the sides
= 3 + 4 + 2 + 2 =11 units.
Bridges-in-Mathematics-Grade-3-Student-Book-Unit-6-Module-2-Answer-Key-53

Perimeter is the distance around the parallelogram.
So the perimeter of the above figure is
Perimeter = Sum of all the sides
= 4 + 4 + 3 + 3 =14 units.
Question 3.
After you’ve agreed on the order, write the letters of the quadrilaterals where you think they belong in the boxes below.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 19
Answer:
Bridges-in-Mathematics-Grade-3-Student-Book-Unit-6-Module-2-Answer-Key-56

Question 4.
Estimate the perimeter of each quadrilateral. Write your estimates on the chart below. Then measure the perimeter of each quadrilateral, and label the quadrilateral to show your work. Record the actual perimeters on the chart below.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 20
Answer:
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key-61

Perimeter Practice

Perimeter is the total length of all sides of a shape. To find the perimeter, add the lengths of all the sides of a shape.

Question 1.
Use a ruler marked in inches to measure the sides of the squares and rectangles. Label each side. Then find the perimeter of each shape. Show your work.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 21
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key 22
Answer:
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key-39
Perimeter is the distance around the rectangle.
So the perimeter of the above figure is
Perimeter = Sum of all the sides
= 3 + 3 + 1 + 1 =8″.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key-40

Perimeter is the distance around the rectangle.
So the perimeter of the above figure is
Perimeter = Sum of all the sides
= 2 + 2 + 2 + 2 =8″.
Bridges in Mathematics Grade 3 Student Book Unit 6 Module 2 Answer Key-41
Perimeter is the distance around the rectangle.
So the perimeter of the above figure is
Perimeter = Sum of all the sides
= 3 + 3 + 1 + 1 =8″.

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