Lesson 6 Rectangles and Squares

    • Let’s explore what makes a shape a rectangle or a square.

Warm-up Number Talk: Some Sums

Find the value of each expression mentally.

Activity 1 Rectangles and Squares

  1. These are rectangles.

    A collection of rectangles.

    What is the same about all these rectangles?

  2. These are not rectangles.

    What makes these shapes different from the rectangles?

  3. These are squares.

    A collection of squares.

    What is the same about all these squares?

  4. These are not squares.

    A collection of 3 shapes. First, an open shape with 4 sides. Second, a rectangle. Third, a shape with 4 slanted equal length sides.

    What makes these shapes different from the squares?

Activity 2 Draw Rectangles and Squares

rectangles

Problem 1

  1. Draw 5 rectangles.

    Dot paper.

  2. How do you know these are rectangles?

Problem 2

  1. Draw 3 shapes that are not rectangles.

    Dot paper.

  2. How do you know these are not rectangles?

Problem 3

  1. Draw 5 squares.

    Dot paper.

  2. How do you know these are squares?

Problem 4

  1. Draw 3 shapes that are not squares.

    Dot paper.

  2. How do you know these are not squares?

Practice Problem

Problem 1

  1. Draw 2 different rectangles and 2 different squares.

    Dot paper.

  2. How are the shapes the same? How are they different?