Convex and Concave Polygon

Name and classify the polygon. Select ALL that apply.

• Pentagon

• Regular

• Irregular

• Convex

• Concave

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.

Is the figure a polygon? Is it convex or concave?

• Not a polygon, convex

• Polygon, convex

• Not a polygon

• Polygon, concave

What type of polygon is this?

• concave

• convex

Convex or Concave?

• convex

• concave

Find the sum of the interior angles of a nonagon.

• 1260

• 900

• 1620

• 180

Convex or Concave?

• Convex

• Concave

What is the measure of one interior angle of a regular hexagon?

• 120

• 60

• 45

• 135