Lenght of arc for center angle of 1 = 0.008727 d

Lenght of arc for center angle of n = 0.008727 nd

Example: Find the area A and circumference C of a circle with a diameter of 2 inches.

Example: The area of a circle is 16.8 square inches. Find its diameter.

Example: The radius of a circle is 35 millimeters, and angle ? of a sector of the circle is 60 degrees. Find the area of the sector and the length of arc l.

Example: The radius r is 60 inches and the height h is 8 inches. Find the length of the chord c.

Example: If c = 16, and h = 6 inches, what is the radius of the circle of which the segment is a part?

Example: Let the outside diameter D = 12 centimeters and the inside diameter d = 8 centimeters Find the area of the ring.

By the alternative formula:

Example: Find the area, if the outside radius R = 5 inches, the inside radius r = 2 inches, and ? = 72 degrees.

Example: Find the area of a spandrel, the radius of which is 0.7 inch.

Example: If chord c were given as 2.2 inches,...