Area = pi*r2
So r = 20 inch gives area = 1256.64 sq inches.
1,256.6 units2
If area of circle is equaled to 100pi what is the radius?
The radius of a circle whose circumference is 40pi is 20 units.
The radius is 1/2 of the diameter, so if the radius is 20 units then the diameter is 40 units. You multiply the radius by 2 to get the diameter.
You misunderstand. 'The area of the diameter'. The diameter is a STRAIGHT LINE, it is NOT an area. The question should read ' How do you find the area of a circle, knowing only the diameter?' To answer the question Remember the equation ;- A = pi*r^2 Where 'A' is the area 'pi' ~ 3.14 (A constant) 'r' is the radius. Now the radius is one half the diameter ; (r = d/2) or (d = 2r) We can algebraically substitute A = pi *(d/2)^2 So as an example , is the diameter is 20 Then A = 3.14 ( 20/2)^2 (Remember ; do what's inside the brackets first) A = 3.14 * 10^2 A = 3.14 * 100 A = 314.00
A circle with a radius of 20 yards has an area of 1,256.64 square yards.
A circle with a radius of 20 yards has an area of 1,256.64 square yards.
The radius would be 10 inches. Not sure about a radious, though.
Radius of a circle with 20' circumference = 20'/2pi = 3.18'Area of a circle with 3.18' radius = ((3.18')^2)pi = 31.8 square feet
1,256.6 units2
400 pi
Area of a circle = πr² (remember that r or radius is exactly half of the diameter) Radius therefore = 40/2 = 20 inches Thus the Area = 3.14159 × 20 squared = 1256.636 square inches
If area of circle is equaled to 100pi what is the radius?
The area of a circle is computed by the formula A = pi * r2 (r is the radius of the circle)For a 20 foot circle, the radius is 10 feet and the area is 314.16 square feet.
Using 3.14 as Pi the area of circle is: 1256.0
1,256.6 square units.
3.14*202