Question

A circle has a diameter of 10 centimeters. What is the best approximation of its area? Use 3.14 to approximate for π .


A: 15.7 cm²

B: 31.4 cm²

C: 78.5 cm²

D: 314 cm²

Answer 1

If it has a diameter of 10, divide it by 2 to get Radius (5) because Area = πr²
Then you do r * π *r which would be 78.5. so C is your answer.

Answer 2

divide 10 by 2, gives you 5. multiply that by 5, 5*5= 25 then multiply that by 3.14. 25*3.14, gives you 78.5 hope this helped :D