Question

Plz somebody I need these and I'm failing math cause of these problems.

Answer 1

1. Area of the circle with 6 cm radius is
`113.14 cm^2`.

2. Area of the circle with 28 cm diameter is
`616 cm^2`.

Explanation:

1. Radius of the circle ,r= 6 cm

Area of the circle , A=
`\pi r^2`

`A=\pi (6 cm)^2=(22)/(7)* 6 cm* 6 cm=113.14 cm^2`

Area of the circle with 6 cm radius is
`113.04 cm^2`.

2. Diameter of the circle = d = 28 cm

Radius of the circle , r =

Area of the circle , A=
`\pi r^2`

`A=\pi (14 cm)^2=(22)/(7)* 14 cm* 14 cm=616cm^2`

Area of the circle with 28 cm diameter is
`616cm^2`.

Answer 2

1.A =113.04 cm^2

2.A =616 in^2

Explanation:

To find the area of a circle we use the formula

A = pi * r^2 if we know the radius or

A = pi * (d^2/4) if we know the diameter

In problem 1 we know the radius

A = pi * r^2

A = pi * (6)^2

A = 36*pi

Using 3.14 for pi

A = 36* 3.14

A =113.04 cm^2

In problem 2 we know the diameter

A = pi * d^2/4

A = pi * (28)^2/4

A = pi 784/4

A = 196

Using 22/7 for pi

A = 196*22/7

A =616 in^2