Regular and Irregular Polygons

If the sum of the interior angles of a polygon equals 900°, how many sides does the polygon have? 

• 7
• 9
• 10
• 12

What is a polygon called if the sum of its interior angles equals 1440° ?

• Octogon
• Nonagon
• Decagon
• Dodecagon

Find the value of one angle measurein a pentagon

• 108
• 60
• 120
• 135

What is the sum of the exterior angles of a decagon

• 1440
• 360
• 540
• 720

Find the sum of interior angles in a heptagon

• 900
• 720
• 540
• 180

Find one interior angle in a heptagon

• 128.57
• 108
• 120
• 135

Which of the following is NOT a polygon's characteristic?

• Angles

• Close Shape

• Vertex

• Open Shape

A polygon has to have

• at least two sides
• at least three sides
• four or more sides
• no sides

A polygon is:

• An open shape with the same sides and angles

• Polygons are 2-dimensional shapes. They are made of straight lines, and the shape is "closed" (all the lines connect up).

• A 3d shape that is not joined by lines.

An irregular polygon is:

• A polygon with different sides and different angles.

• A polygon with congruent Vertex

• A polygon with congruent sides and congruent angles

• Is not a Polygon