Exam 21: Polygons and Circles

How many distinct diagonals can be drawn in a decagon?

To the nearest hundredth inch, what is the circumference of a circle whose diameter is 12.2 centimeters?

How many degrees are in a semicircle?

What is the perimeter in centimeters of a regular pentagon whose side measures 11 centimeters?

What is the difference between the circumference of a wheel, whose diameter is 8.48 units long, and a pulley, whose diameter is 6.76 units long? Express the answer to the nearest hundredth units.

The perimeter of a regular octagon is 208 mm. How long is each side of the octagon in millimeters?

Polygons and circles separate a plane into three regions: points on the figure, points in the interior of the figure, and points in the exterior of the figure.

What is the formula for the circumference (C) of a circle given the diameter (d) of the circle?

A quadrilateral always has 4 right angles and two sets of parallel sides.

What is a polygon with 7 sides is called?