# McGraw Hill My Math Grade 1 Chapter 9 Lesson 2 Answer Key Triangles and Trapezoids

All the solutions provided in McGraw Hill My Math Grade 1 Answer Key PDF Chapter 9 Lesson 2 Triangles and Trapezoids will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 1 Answer Key Chapter 9 Lesson 2 Triangles and Trapezoids

Explore and Explain How many ? ____________
How many ? ____________
Teacher Directions: Use trapezoid and triangle pattern blocks. Find the white shapes in the picture. Color the trapezoids red. Color the triangles green. Write how many of each shape you colored. Describe the shapes. Explanation:
I used trapezoid and triangle pattern blocks
I found the white shapes in the picture
I colored the trapezoids red and colored the triangles green
There 1 trapezoid and 5 triangles.

See and Show

Triangles and trapezoids are two-dimensional shapes. They are closed. They have straight sides and vertices. triangle trapezoid Write how many sides and vertices.

Question 1. ___________ sides
___________ vertices
3 sides
3 vertices

Explanation:
A triangle is a closed figure that has 3 sides and 3 vertices.

Question 2. ___________ sides
___________ vertices
4 sides
4 vertices

Explanation:
A trapezoid is a shape that has 4 sides and 4 vertices and only 2 of my sides are the same length.

Question 3. ___________ sides
___________ vertices
4 sides
4 vertices

Explanation:
The given object is in the shape of a trapeziod
A trapezoid is a shape that has 4 sides and 4 vertices and only 2 of my sides are the same length

Question 4. ___________ sides
___________ vertices
3 sides
3 vertices

Explanation:
The above given object is in the shape of a triangle
A triangle is a closed figure that has 3 sides and 3 vertices.

Talk Math How are a triangle and a trapezoid different?
A triangle has only 3 sides and a trapezoid has 4 sides.

Write how many sides and vertices.

Question 5. ___________ sides
___________ vertices
4 sides
4 vertices

Explanation:
A trapezoid is a shape that has 4 sides and 4 vertices and only 2 of my sides are the same length.

Question 6. ___________ sides
___________ vertices
3 sides
3 vertices

Explanation:
A triangle is a closed figure that has 3 sides and 3 vertices

Circle the objects that match the description.

Question 7.
4 sides
4 vertices  Explanation:
I drew a circle around the object that has 4 sides and 4 corners.

Question 8.
3 sides
3 vertices  Explanation:
I drew a circle around the circle that has 3 sides and 3 vertices.

Circle the closed shapes.

Question 9.  Explanation:
I drew circles around the closed shapes.

Problem Solving

Draw and write the name of each shape.

Question 10.
I am a two-dimensional shape that has 3 sides and 3 vertices. What shape am I?  Explanation:
3 sides
3 vertices
A triangle is a closed figure that has 3 sides and 3 vertices

Question 11.
I am a two-dimensional shape that has 4 sides and 4 vertices. Only 2 of my sides are the same length. What shape am I? Explanation:
4 sides
4 vertices
A trapezoid is a shape that has 4 sides and 4 vertices and only 2 of my sides are the same length

HOT Problem Ty has 3 different shapes. The shapes have 11 sides and 11 vertices in all. What shapes can he have? Explain.
He can have 2 trapezoids and 1 triangle
Trapezoid has 4 sides
A triangle has 3 sides
So, 4 + 4+ 3 = 11
Therefore, Ty ha s2 trapezoids and 1 traingle.

### McGraw Hill My Math Grade 1 Chapter 9 Lesson 2 My Homework Answer Key

Practice

Write how many sides and vertices.

Question 1. _________ sides
_________ vertices
3 sides
3 vertices

Explanation:
A triangle is a closed figure that has 3 sides and 3 vertices

Question 2. _________ sides
_________ vertices
4 sides
4 vertices

Explanation:
A trapezoid is a shape that has 4 sides and 4 vertices and only 2 of my sides are the same length

Question 3. _________ sides
_________ vertices
4 sides
4 vertices

Explanation:
A trapezoid is a shape that has 4 sides and 4 vertices and only 2 of my sides are the same length

Question 4. _________ sides
_________ vertices
3 sides
3 vertices

Explanation:
A triangle is a closed figure that has 3 sides and 3 vertices

Question 5.
Color all of the triangles red. Color all of the trapezoids purple. Then write how many. ___________ triangles
___________ trapezoids Explanation:
I colored the triangles red and the trapezoids in purple
There are 4 triangles and 2 trapezoid

Draw and write the name of the shape.

Question 6.
I am a two-dimensional shape that has less than 4 sides. All of my sides are straight. What shape am I? Explanation:
3 sides
3 vertices
A triangle is a closed figure that has 3 sides and 3 vertices

Vocabulary Check

Draw lines to match.  