Log in Sign up for FREE

Unit 7 - Lesson 7 - Grade 3: Illustrative Mathematics

Last updated 9 months ago

21 questions

Note from the author:

Grade 3 Unit 7
Lesson 7: Same Perimeter, Different Shapes
CC BY 2021 Illustrative Mathematics®

Instructions

Grade 3 Unit 7
Lesson 7: Same Perimeter, Different Shapes
CC BY 2021 Illustrative Mathematics®

Lesson: Same Perimeter, Different Shapes

True or False: Sums of Four Numbers (Warm Up)

1

123 + 75 + 123 + 75 = 100 + 100 + 70 + 70 + 5 + 5 + 3 + 3

1

Explain your reasoning.

1

123 + 75 + 123 + 75 = (2 x 123) + (2 x 75)

1

Explain your reasoning.

1

123 + 75 + 123 + 75 = 208 + 208

1

Explain your reasoning.

1

123 + 75 + 123 + 75 = 246 + 150

1

Explain your reasoning.

All Kinds of Shapes

Choose any 3 shapes and find the perimeter of each shape. Explain or show your reasoning.

Shape #1

1

I chose shape__________

1

What is the perimeter of the shape? Explain or show your reasoning.

Shape #2

1

I chose shape__________

1

What is the perimeter of the shape? Explain or show your reasoning.

Shape #3

1

I chose shape__________

1

What is the perimeter of the shape? Explain or show your reasoning.

1

Find one shape that has the same perimeter as one of the shapes you chose earlier. Be prepared to explain your reasoning.

Draw Your Own

1

Draw 2 shapes with the perimeter of 12 units.

1

Draw 2 shapes with the perimeter of 26 units.

1

Draw 2 shapes with the perimeter of 48 units.

1

With your partner, choose a length. Then, draw your own shape with that perimeter.

1

Share the shapes you drew and discuss how they are alike and how they are different.

Cool Down: Create Your Own Shapes

1

Draw 2 different shapes that have a perimeter of 32 units.