Question

What is the area of the following circle?
Either enter an exact answer in terms of or use 3.14 for and enter your answer as a decimal.
d=10

Answer 1

The area of a circle is πr².   Here we're given the diameter d=10 so r is half that, r=5 and the area is

Answer: 25π

Answer 2

Pie times radius squared is the area. Here if the diameter is 10, the radius’s 5. So do 5 squared which is 25, times pie. So 25pie is the answer.