Question

find the area and the circumference of a circle with radius 9m. use the value 3.14, and do not round your answers. be sure to include the correct units in your answers.

Answer 1

If the radius is 9m, the diameter is 18m, so the circumference is 18pi, or 56.52 meters.

To find the area, use the formula r^2*pi to get 81*pi, or 254.34.

Answer 2

Area of circle is 254.34 $m^{2}$, circumference of a circle is 56.52 m.

What is area of circle?

The area of a circle is the space occupied by the circle in a two-dimensional plane. Alternatively, the space occupied within the boundary/circumference of a circle is called the area of the circle.

Area of circle = $\pi r^{2}$

What is circumference of circle?

The circumference of a circle is the perimeter of the circle. It is the total length of the boundary of the circle. The circumference of a circle is the product of the constant π and the diameter of the circle.

Circumference of a circle = 2$\pi$r

Given

Radius of circle = 9m

The circumference of a circle = 2$\pi$r

C = 2$\pi$(9)

C = 2 × 3.14 × 9

C = 56.52 m

Area of circle = $\pi r^{2}$

A = 3.14 × $9^{2}$

A = 254.34 $m^{2}$

Hence, area of circle is 254.34 $m^{2}$, circumference of a circle is 56.52 m.

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