Sadie wants to draw a clock face on a circular piece of cardboard. if the clock face has a diameter of 20 centimeters and is divided into congruent pieces so that each sector is 30 degrees, what is the area of each piece?
+23248 The usual formula for the area of a cirlce is: A = pi·r2
Since the clock face has a diameter of 20 centimeters, it will have a radius of 10 centimeters.
---> The area of the clock face will be: A = pi·102 ---> A = 100pi
Since there are 12 cngruent sectors on the clock face, the area of each sector is: 100pi / 12 = 25pi / 3
