Topics
10. Shapes and angles
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United States of AmericaVA
Grade 4

10.01 Properties of shapes

Lesson
Practice
Lesson

Are you ready?

Can you identify a 2D shape using its basic properties?

What is the name of the shape in the picture below?

  1. Triangle

    A

    Rectangle

    B

Learn

This video will show you how to work out the name of a 2D shape based on its properties. 

Vocabulary:

A polygon is a 2D shape that is made of straight lines and is closed.

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Question 1

Which of the following shapes are rectangles? Choose all correct answers.

  1. A

    B

    C

    D

 

Learn

This image shows the different categories of quadrilaterals and their properties. A pair of angled markings means two opposite sides are parallel. If any two sides have the same straight markings then they have the same length.

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Question 2

Select all parallelograms:

  1. A

    B

    C

    D

    E

    F

 

Remember!

The features of 2D shapes help us know which shape we are looking at, such as:

  • the number of sides, including any that are equal or parallel
  • the number of angles, including any that are right angles

Outcomes

4.11

Identify, describe, compare, and contrast plane and solid figures according to their characteristics (number of angles, vertices, edges, and the number and shape of faces) using concrete models and pictorial representations

4.12

Classify quadrilaterals as parallelograms, rectangles, squares, rhombi, and/or trapezoids

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