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Unit 7 - Lesson 8 - Grade 5: Illustrative Mathematics

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Grade 5 Unit 7
Lesson 8: Sort Triangles
CC BY 2021 Illustrative Mathematics
Grade 5 Unit 7
Lesson 8: Sort Triangles
CC BY 2021 Illustrative Mathematics
Lesson: Sort Triangles

Estimation Exploration: Angle Measure (Warm Up)

1.

What is the measure of the angle?


Record an estimate that is:

The Right Fit

2.

Find a triangle card that fits in each space on the grid. If you don’t think it is possible to find a triangle that fits certain criteria, explain why not.


All, Some, None

3.

Sort the triangle cards from the previous activity in a way that makes sense to you. Describe how you sorted the cards.

Now sort out the triangles with a 90 degree angle. For these triangles, write statements about each category.
4.

All of the triangles with a 90 degree angle...

5.

Some of the triangles with a 90 degree angle...

6.

None of the triangles with a 90 degree angle...

Cool Down: All, Some, None of the Triangles
Complete the statements about the triangles below.

7.
All of the triangles _______.
8.
Some of the triangles _______.
9.
None of the triangles _______.