Unit 9: Polygons

Which of these is NOT a property of a polygon?

• Straight sides

• Curved sides

• 3 or more sides

• Closed (no unconnected lines)

Regular polygon definition

• Polygon with all sides and angles congruent

• All diagonals stay inside the polygons (all interior angles <180)

• Closed figure with 3 or more straight sides

• At least one diagonal drawn goes outside of the polygon

Convex polygon definition

• Polygon with all sides and angles congruent

• All diagonals stay inside the polygons (all interior angles <180)

• Closed figure with 3 or more straight sides

• At least one diagonal drawn goes outside of the polygon

Concave polygon definition

• Polygon with all sides and angles congruent

• All diagonals stay inside the polygons (all interior angles <180)

• Closed figure with 3 or more straight sides

• At least one diagonal drawn goes outside of the polygon

Polygon definition

• Polygon with all sides and angles congruent

• All diagonals stay inside the polygons (all interior angles <180)

• Closed figure with 3 or more straight sides

• At least one diagonal drawn goes outside of the polygon

A HEPTAGON has how many sides?

• 3

• 5

• 7

• 9

A NONAGON has how many sides?

• 3

• 5

• 7

• 9

A PENTAGON has how many sides?

• 3

• 5

• 7

• 9

A HEXAGON has how many sides?

• 5

• 6

• 7

• 8

A OCTAGON has how many sides?

• 12

• 6

• 10

• 8