The radius of a circle is always 1/2 its diameter.
Area of the circle: pi*20*20 = 400*pi square cm
Using 3.14 as Pi the area of circle is: 1256.0
A = pi R^2 = 400 pi R^2 = 400 R = 20
First we have to find the radius: pi*radius2 = 400*pi square meters Divide both sides by pi and then square root both sides: radius = 20 meters 2*pi*radius or pi*diameter = circumference 2*pi*20 = 40*pi meters
Area of circle: pi*20^2 = 400*pi square units
area = pi x diameter squared/4 = 400 pi diameter squared = 4 x 400 x pi/pi = 1600 diameter = sqrt 1600 = 40
The area of a circle is (pi) times (the radius)2. The radius of the given circle is 1/2 of the diameter = 20m. Area = (pi) times (20)2 = 400(pi) = 1,256.64 square meters(rounded)
The radius of a circle is always 1/2 its diameter.
Area of the circle: pi*20*20 = 400*pi square cm
Area = pi * r2r = d/2 = 40/2 = 20Area = 400*pi= 1,256.636 approximate
area circle = π × radius² = π × (400 miles)² = 160000π sq mi ≈ 502655 sq mi
πr^2 = 3.142 * 20 * 20 = 3.14159 * 400 = 1256.636 cm^2
Area = pi times radius2 where radius = 200 feet therefore area = pi times 2002 Area = 125 663.7 feet2
the area of the circle is increased by 400%
If a circle has area of 400 square units then its radius is: 11.25 units.
Assuming the circle is tangent to the sides of the square, then the edges of the circle meet the square at the midpoint on each of the four sides. So the diameter of the circle is the same as the length of a side of the square. So all you need to do is find the length from the total area by taking the square root of the area (since A = s2), which gives you the diameter, then halve it to get the radius.