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9.09 Classify 2D figures

Lesson

Are you ready?

Being able to identify parallel lines can help us in this lesson.

Select the diagram showing a pair of parallel lines:

  1. A

    B

    C

    D

Learn

This video shows you how to classify shapes based on a number of key features including sides and angles.

Apply

Select all parallelograms:

  1. A

    B

    C

    D

    E

    F

Remember!

To name a shape, look at its key features, including sides, angles, and vertices.

Outcomes

4.G.A.2

Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines or the presence or absence of angles of a specified size. Classify triangles based on the measure of the angles as right, acute, or obtuse.

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