Question

The diameter of a circle is 9 cm. What is the area of the circle? Use 3.14 for Pi

Answer 1

the area of the circle :

r = 9\2

so :

S= r² * Pi = (9\2)² * 3.14 = 63.58 cm²

Answer 2

The area of a circle is the product of pi and the square of its radius. It is expressed as:

Area = pi x r^2 where r = d/2

We calculate as follows:
Area = pi x r^2
Area = pi x (d/2)^2
Area = pi x (d^2 / 4)
Area = 3.14 x (9^2 / 4)
Area = 63.59 cm^2

Hope this answers the question. Have a nice day.