9.09 Classify 2D figures

Lesson

Practice

Lesson

Are you ready?

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

Select the diagram showing a pair of parallel $lines$ :

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 $parallelograms$ :

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.