Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key

The solutions to Bridges in Mathematics Grade 3 Home Connections Answer Key Unit 8 Module 2 can help students to clear their doubts quickly.

Bridges in Mathematics Grade 3 Home Connections Answer Key Unit 8 Module 2

Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Session 1 Answer Key

Finding Area & Perimeter

Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 1
You can use any ruler or measuring tape marked in centimeters for this assignment, or cut out the centimeter ruler below. Keep the ruler for use in future assignments.
Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 2

Question 1.
Measure the dimensions (length and width) of each rectangle. Label the dimensions, then find the rectangle’s area and perimeter using equations. Show your work. The first one is done as an example.
ex:
Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 3
Perimeter: (2 × 3) + (2 × 9) = 24 cm
Area: 3 × 9 = 27 sq. cm

a.
Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 4
Perimeter: _______________
Area: _______________
Answer:
Length = 6 cm
Width = 2 cm
We know that,
Area of the rectangle = lw
A = 2 × 6 = 12 sq. cm
Perimeter of the rectangle = 2(l + w)
P = 2(2 + 6)
= 2(8)
= 16 cm
Perimeter: 16 cm
Area: 12 sq. cm

b.
Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 5
Perimeter: _______________
Area: _______________
Answer:
Given,
Length = 8 cm
width = 4 cm
We know that,
Area of the rectangle = lw
A = 8 × 4 = 32 sq. cm
Perimeter of the rectangle = 2(l + w)
P = 2(8 + 4)
= 2(12)
= 24 cm
Perimeter: 24 cm
Area: 32 sq. cm

c.
Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 6
Perimeter: _______________
Area: _______________
Answer:
Given,
Length = 7 cm
width = 5 cm
We know that,
Area of the rectangle = lw
A = 7 × 5 = 35 sq. cm
Perimeter of the rectangle = 2(l + w)
P = 2(7 + 5)
= 2(12)
= 24 cm
Perimeter: 24 cm
Area: 35 sq. cm

d.
Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 7
Perimeter: _______________
Area: _______________
Answer:
Given,
Length = 9 cm
width = 1 cm
We know that,
Area of the rectangle = lw
A = 9 × 1 = 9 sq. cm
Perimeter of the rectangle = 2(l + w)
P = 2(9 + 1)
= 2(10)
= 20 cm
Perimeter: 20 cm
Area: 9 sq. cm

e.
Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 8
Perimeter: _______________
Area: _______________
Answer:
Given,
Length = 8 cm
width = 4 cm
We know that,
Area of the rectangle = lw
A = 8 × 4 = 32 sq. cm
Perimeter of the rectangle = 2(l + w)
P = 2(8 + 4)
= 2(12)
= 24 cm
Perimeter: 24 cm
Area: 32 sq. cm

Question 2.
Hector says you have to measure the length of every side of this figure to find its perimeter. Do you agree? Why or why not? Use numbers, labeled sketches, or words to explain your answer.
Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 9
Answer: Some will want to measure every side. Others might trust that all angles in the figure are right angles and be able to draw conclusions about side lengths without measuring them all.

Question 3.
This rectangle has an area of 45 square feet. What is the missing dimension? Show your work.
Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 10
Answer:
Given,
This rectangle has an area of 45 square feet.
Width = 5 ft
We know that,
Area of the rectangle = lw
45 = 5 × l
l = 45/5
l = 9 ft
Thus the missing dimension is 9 ft.

Question 4.
Alexandra and her dad built a deck in their back yard. The deck’s area is 48 square feet and its perimeter is 28 feet. Circle the drawing that shows the deck they built. Use numbers, sketches or words to explain your answer.
Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 11
Answer:
Alexandra and her dad built a deck in their back yard.
The deck’s area is 48 square feet and its perimeter is 28 feet.
A = 8 × 6 = 48 sq. ft
Bridges-in-Mathematics-Grade-3-Home-Connections-Unit-8-Module-2-Answer-Key-11

Question 5.
CHALLENGE For which of these situations would you calculate area? For which of them would you calculate perimeter? Check a box for each one.
Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 12
Answer:
Bridges-in-Mathematics-Grade-3-Home-Connections-Unit-8-Module-2-Answer-Key-12

Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Session 3 Answer Key

Measuring Scavenger Hunt

Question 1.
Look around your home, yard, or anywhere else to find objects that are about as long as the goal lengths in the table below. They don’t have to be exact, just as close as you can find. Measure their actual lengths and calculate the difference between the goal and the actual length.
Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 13
You can use any ruler, yardstick or measuring tape marked in inches, or use the inch ruler to the right. Cut out the ruler if you like. Keep it for use in future assignments.
Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 14
Answer:
Bridges-in-Mathematics-Grade-3-Home-Connections-Unit-8-Module-2-Answer-Key-14

Question 2.
Now look for objects that have an area close to the areas in the table below. Measure the object’s dimensions and record them in the table. (You can use the side or face of a three-dimensional object, as shown in the example.)
Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 15
Answer:

Footprints

Question 3.
An object’s footprint is the space it takes up when it sits on a flat surface, like the floor or a piece of paper.
a. Find an object with a rectangular or nearly rectangular base that you can fit on the centimeter grid below. Place it on the grid and trace its outline. This outline is its footprint.
Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 16
Answer:

b. What object did you choose?
Answer:

c. What is the approximate area of the object’s footprint? Show your work.
Answer:

d. CHALLENGE If you wanted to store 10 of these objects together on a shelf without stacking any of them on top of each other, how big would the shelf’s area need to be?
Answer:

Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Session 5 Answer Key

Dividing Shapes into Triangles

Question 1.
Divide the shapes. If you need to, measure to make sure the partitions are equal. You can use any ruler or measuring tape, or a paper ruler from the last two Home Connections.

a. Draw lines to divide these shapes into two equal triangles. Label each triangle with a fraction to show its part of the whole. The first one has been done for you.
Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 17
Answer:
Bridges-in-Mathematics-Grade-3-Home-Connections-Unit-8-Module-2-Answer-Key-17

b. Draw lines to divide these shapes into as many triangles as they have sides. Label each triangle with a fraction to show its part of the whole. The first one has been done for you.
Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 18
Answer:
Bridges-in-Mathematics-Grade-3-Home-Connections-Unit-8-Module-2-Answer-Key-18

c. Draw 3 lines to divide the shape into 4 congruent triangles and label each triangle with a fraction to show its part of the whole.
Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 19
Answer:
Bridges-in-Mathematics-Grade-3-Home-Connections-Unit-8-Module-2-Answer-Key-19

Question 2.
Draw two shapes of your own, then divide them into equal triangles. Mark each triangle with a fraction to show its part of the whole.
Answer:
Bridges-in-Mathematics-Grade-3-Home-Connections-Unit-8-Module-2-Answer-Key-20

Question 3.
a. CHALLENGE Divide the rectangle into six equal triangles.
Bridges in Mathematics Grade 3 Home Connections Unit 8 Module 2 Answer Key 20
Answer:
Bridges-in-Mathematics-Grade-3-Home-Connections-Unit-8-Module-2-Answer-Key-20 (1)

b. CHALLENGE How many triangles are in \(\frac{1}{2}\) of the rectangle?
Answer: 3 triangles are in \(\frac{1}{2}\) of the rectangle

c. CHALLENGE How many triangles are in \(\frac{2}{3}\) of the rectangle?
Answer: 4 triangles are in \(\frac{2}{3}\) of the rectangle

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