Polygon Vocab

Front

Regular polygon:

Back

All sides and angles congruent.

Front

Polygon with all vertices pointing outward?

Back

Convex Polygon

Front

Polygon: A closed figure made of straight line segments

Back

A closed figure made of straight line segments

Front

Best name for the polygon?

Back

Irregular Octagon

Front

Non-convex (concave) polygon:

Back

One or more vertices are pointed in.

Front

Central angle of a regular polygon?

Back

72°

Front

Central angle: vertex at polygon center

Back

An angle with its vertex at the center of a polygon

Front

Measure of one central angle of a regular polygon.

Back

45°

Front

Interior angle?

Back

An angle with its vertex in a corner of the polygon.

Front

Shortcut for sum of interior angles of a polygon?

Back

180(n - 2)