Lesson 4 Attributes of Rectangles, Rhombuses, and Squares

    • Let’s find out what makes polygons, specifically right triangles, rectangles, rhombuses, and squares what they are.

Warm-up Which One Doesn’t Belong: More Attributes

Which one doesn’t belong?

  1. A 4-sided shape.
  2. A four-sided shape.
  3. A triangle.
  4. A shape with 4 sides.

Activity 1 What Makes These Shapes So?

Problem 1

These are polygons.

various polygons

These are not polygons.

various shapes that are not polygons

  1. Which of the following are polygons? Circle them.

  2. What makes a shape a polygon?

Problem 2

These are right triangles.

4 right triangles.

These are not right triangles.

4 triangles.

  1. Which of the following are right triangles? Circle them.

    Ten 3 and 4-sided shapes labeled A to J.

  2. What makes a shape a right triangle?

Problem 3

These are rectangles.

6 rectangles.

These are not rectangles.

Six 4-sided shapes.

  1. Which of the following are rectangles? Circle them.

    Ten 3 and 4-sided shapes labeled A to J.

  2. What makes a shape a rectangle?

Problem 4

These are rhombuses.

Six 4-sided shapes.

These are not rhombuses.

Five 4-sided shapes.

  1. Which of the following are rhombuses? Circle them.

    Ten 3 and 4-sided shapes labeled A to J.

  2. What makes a shape a rhombus?

Problem 5

These are squares.

4 squares of different sizes.

These are not squares.

Five 4-sided shapes.

  1. Which of the following are squares? Circle them.

    Ten 3 and 4-sided shapes labeled A to J.

  2. What makes a shape a square?

Practice Problem

Problem 1

Select all of the quadrilaterals that are rectangles.

  2. square