Question

47) Find the area of a circle with diameter of 10 cm. Let pi = 3.14.

48) Find the area of a circle with radius of 2 cm. Let pi = 3.14.​

Answer 1

Explanation:

note :

the area of a circle is : A= π×r² ....r : radius and : D=2r ... D : diameter

47) D = 10 cm r= 10cm/2 = 5 cm

A=π×r² = 3.1448×5² =78.62cm²

48) A= 3.1448×2²= 12.58cm²