The distance around a circle is 56.55 meters long. I already know the diameter of it is about 18.01 meters long or something, but what is the area?

Here is another question~

The area of a circle is 452.39ft². What would the diameter have to be? And what would the circumference of the circle be too?

SucksAtMath
Dec 15, 2017

#1**+1 **

1)

Circumference = Diameter x Pi

Radius = Diameter / 2

56.55 =Diameter x 3.141593 Divide both sides by 3.141592

Diameter =56.55/3.141592

Diameter =18 m

Radius =18/2 = 9 m

Area = Radius^2 x Pi

Area = 9^2 x 3.141592

**Area =254.47 m^2**

2)

452.39 = Radius^2 x Pi

452.39 = Radius^2 x 3.141592 Divide both sides by 3.141592

144 = Radius^2 Take the square root of both sides

Radius = 12 Ft.

**12 x 2 = 24 Ft - the diameter.**

Circumference =24 x 3.141592

**Circumference =75.4 Ft.**

Guest Dec 15, 2017

#1**+1 **

Best Answer

1)

Circumference = Diameter x Pi

Radius = Diameter / 2

56.55 =Diameter x 3.141593 Divide both sides by 3.141592

Diameter =56.55/3.141592

Diameter =18 m

Radius =18/2 = 9 m

Area = Radius^2 x Pi

Area = 9^2 x 3.141592

**Area =254.47 m^2**

2)

452.39 = Radius^2 x Pi

452.39 = Radius^2 x 3.141592 Divide both sides by 3.141592

144 = Radius^2 Take the square root of both sides

Radius = 12 Ft.

**12 x 2 = 24 Ft - the diameter.**

Circumference =24 x 3.141592

**Circumference =75.4 Ft.**

Guest Dec 15, 2017