The diameter of a round dinner plate is 10 inches. What's the area of the plate?
A. 39.25 square inches
B. 39.25 inches
C. 78.5 square inches
D. 314 square inches

Respuesta :

A= pi times r*r so if you are using 3.14 as pi the answer is 78.5 because 5x5=25
25x3.14=78.5