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K-5 Grade 1 Unit 7 Lesson 5

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•K-5 Math 6-8 Math 9-12 Math

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Lesson 5

Warm-up Activity 1 Activity 2 Activity 3

Unit 7, Lesson 5

Some Triangles, All Triangles

Grade 1

Warm-up

Which 3 go together?

Closed shape. 4 curved equal length sides. 4 points. — A

2 triangles, touching at one point. — B

Closed shape. 3 straight sides. 1 square corner. — C

Open shape, 3 corners. — D

Activity 1

These are triangles.

What is the same about all these triangles?
These are not triangles.

What makes these shapes different from the triangles?

Activity 2

Choose 3 dots. Connect the dots.
Draw 3 different triangles.
Draw 3 different shapes that are not triangles.

Dot paper.

Activity 3

Choose a center.

Geoblocks

How Are They the Same?

Center. How Are They the Same.

Compare

Center. Compare.

Counting Collections

Center. Counting Collections.