Topic 13 (7th Grade) Review

Which equation can be used to find the measure of a central angle, c, of a regular decagon (a 10-sided polygon) formed by the diagonals of the decagon?

The interior angle of a regular hexagon measures ___ degrees.

The formula for the area of a circle is ​ (a)  

Match the following aspects of polygons with the corresponding aspect of a circle.

• Diameter

• Area

• Area

• Length

• Circumference

• Unit of measure

• Unit of measure

• Perimeter

The formula for the circumference of a circle is ​ (a)   .

What is the radius of a circle with a diameter of 7 cm?

What is the circumference of a circle with a diameter of 7 cm?

• 452.16

• 37.68

• 113.04

• 108

• 144

The area of the shaded figure pictured here is ​ (a)