Introduction To Polygons

For a figure to be considered a polygon it must meet which of the following requirements? (Select ALL that apply)

• A closed figure

• A figure with curves

• A figure with straight lines and angles

• A figure with a least 3 sides and angles

Which shape is not a polygon?

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• 
• 
• 

Is this figure a polygon?

• Yes

• No

Is this figure a polygon?

• Yes

• No

Is this figure a polygon?

• Yes

• No

Identify the polygon.

• Triangle

• Quadrilateral

• Rectangle

• Pentagon

Match the following names of polygons to the number of sides each polygon has.

• 8

• Pentagon

• 5

• Quadrilateral

• 6

• Hexagon

• 4

• Nonagon

• 9

• Octagon

When a polygon has all equal angles and all equal sides it is called a ________________ polygon.

• Concave

• Regular

• Convex

• Irregular

When any internal angle is greater than 180º and points inward the polygon is called _____________.

• Concave

• Regular

• Convex

• Irregular

Which equation is used to find the interior angle sum.