# Lesson 1 Identify and Sort Shapes

Let’s sort and name shapes based on their sides and corners.

## Warm-up Notice and Wonder: Groups of Shapes

What do you notice? What do you wonder?

## Activity 1 Card Sort: Shapes

Sort the shapes into categories in a way that makes sense to you. Be prepared to explain how you sorted the shapes.

## Activity 2 Penta-what?

Gather clues to find out what kind of shapes belong in each of these categories.

triangle

pentagon

hexagon

quadrilateral

Ask the teacher whether a shape card belongs with one of these categories.

Use this question frame:

Is Shape a ?

Use the clues you gathered to make a true statement.

Shape is a because it has

Would these shapes belong to any of these categories? Explain.

## Activity 3 Compare Shapes

Pick 1 shape card.

Be prepared to name and describe your shape to a partner.

## Practice Problem

## Problem 1

Here are some shapes.

Find a triangle and label it A. Explain why the shape is a triangle.

Find a pentagon and label it B. Explain why the shape is a pentagon.