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

Respuesta :

A=πrˆ2
Since the diameter is 10 inches, the radius must be half of that: 10/2=5.
A=π(5)ˆ2
A=25π
A=25π or 78.54 inches

it is the 78.5 that are the square inches that is the measurement that is the right answer