+7 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?
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.
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.
