Angles of Polygons and Parallelograms Review

What type of polygon is shown in the figure?

• Octagon

• Decagon

• nonagon

• Hendecagon

How many sides does a hexagon have?

How many sides does a nonagon have?

What is the formula for the sum of interior angles in a polygon?

• 180(n−2)

• 180(n−2)÷n

• 360

• 360/n

What is the formula for the sum of exterior angles in a polygon?

• 180(n−2)

• 180(n−2)÷n

• 360

• 360/n

Find the Interior Angle Sum of a Hexagon

Find the Interior Angle Sum of an Octagon

Find the measure of an interior angle in a regular hexagon.

Find the value of X.

Find the value of y.

• 125
• 135
• 140
• 110