Convex Concave Polygons

Convex or Concave?

• Convex

• Concave

Convex or Concave?

• convex

• concave

Convex or Concave?

• convex

• concave

Name and classify the polygon. Select ALL that apply.

• Pentagon

• Regular

• Irregular

• Convex

• Concave

Is the figure a polygon

• Yes

• No

• Maybe

Choose the best word to describe this figure:

• convex

• concave

• regular

• both regular and convex.

Which of the following is FALSE?

• Polygons must have straight sides.

• Polygons must be closed figures.

• Polygons must have 3 or more sides.

• Polygons are always concave.

A polygon is a _________

• a closed 2D figure with curved sides.

• closed, 2D figure with straight sides.

• an open 3D figure with curved sides.

• a 3D figure that is always convex.

What type of polygon is this?

• concave

• convex

What is the formula for the sum of the interior angles of polygons?