Chapter 14.2, Problem 10MC

a. Draw a circle of radius 4 cm and divide it into eight equal-sized sectors.

b. Cut out the eight equal-sized sectors and rearrange the sectors to form a parallelogram-shaped figure such as the one on the student page shown on page 838.

c. The area of a parallelogram is found by multiplying the length of its base b by the height h, or $A=bh$. Use your figure to explain why this formula can be written as $A=\frac{1}{2}Cr$ to find the area of a circle, where C is the circumference and r is the radius of the circle.