Polygon Angle Measures and Properties

Front

What is the SUM of the angle measures in a nonagon (9 sides)?

Back

1260°

Front

What is the name of a 7 sided polygon?

Back

heptagon

Front

A triangle has ____ sides.

Back

3

Front

What is the value of the missing angle if the other angles are 75° and 80°?

Back

105°

Front

What is the value of x if the angles are 38° and x°?

Back

38°

Front

What is the formula to calculate the sum of interior angles of a polygon?

Back

(n-2) × 180°, where n is the number of sides.

Front

How many sides does a hexagon have?

Back

6

Front

What is the name of a polygon with 8 sides?

Back

octagon

Front

If one angle of a triangle is 50° and another is 60°, what is the third angle?

Back

70°

Front

What is the measure of each interior angle in a regular pentagon?

Back

108°