Lesson 2 Attributes of Triangles and Quadrilaterals

    • Let’s sort shapes into more specific categories.

Warm-up True or False: Multiples of Ten

Decide if each statement is true or false. Be prepared to explain your reasoning.

Activity 1 Card Sort: Triangles

Sort the triangles into categories. Record your categories and be prepared to explain how you sorted the shapes.

Card sort with triangles.

Activity 2 Card Sort: Quadrilaterals

Sort the quadrilaterals into categories. Record your categories and be prepared to explain how you sorted the shapes.

Card sort with quadrilaterals.

Practice Problem

Problem 1

6 triangles labeled A to F.
  1. Which triangles have one right angle?

  2. Which triangles have two sides that are the same length?