What is the sum of the angles of an octagon?

If represents the measure of an interior angle of a regular octagon and represents the measure of an interior angle of a regular pentagon, what is the ratio ?

The following is a regular pentagon. What is the measure of angle ?

In the figure above, polygon ABDFHGEC is a regular octagon. What is the measure, in degrees, of angle FHI?

A regular polygon with interior angles of each has how many more sides than a regular polygon with interior angles of each?

What is the measure, in degrees, of each interior angle of a regular convex polygon that has twelve sides?

What is the average (arithmetic mean) of all 15 interior angles of a quadrilateral, pentagon, and hexagon?

Each interior angle of a regular polygon has measure . How many sides does the polygon have?

A regular polygon has a measure of for each of its internal angles. How many sides does it have?

In a particular n-sided polygon, all sides and all angles are congruent. If each angle measures 144 degrees, what is the value of ?