Question

The diameter of a round dinner plate is 10 inches. What's the area of the plate?

Answer 1

78.54

Area of a circle is pi•radius squared
Radius is half or diameter
So pi•5 squared which is 78.54

Answer 2

Lets say pi is 3.14
The area of a circle is: pi*radius squared
The radius is half the diameter so it is 5 inches.
3.14*5 squared 2
3.14*25
78.5inches squared