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What is the formula for the surface area of a circle?
The formula for the surface area of a circle is pi times the square of the radius. It is represented as A equals pi times r squared.
What is the Area of circle of radius 4?
The Area of a circle is Pi (r)(r) so the area of a circle with the radius of 4, would be 16pi
Find the area and perimeter of a given circle?
If 'R' is the radius of the circle, then-- area of the circle is [ pi R2]-- perimeter of the circle is [ 2 pi R ]
What is the mathematical formula for the area of a circle?
If a circle has the area A and radius r, thenA = pi * r^2
In the formula for the area of a circle what's gets multiplied?
Algebraically, it is ; - A = pi r^(2) In words, it is ' Area equals 'pi' multiplied to the radius squared'. NB 'pi' is a constant at 3.141592..... usually shortened to '3.14'. The radius (r) is the distance from the circle centre to the circumference/edge. 'radius squared' is r^(2) , that is 'r' multiplied to 'r' ; r X r = r^(2) . NNB The circumference of a circle is ; C = 2 pi r Note the power/exponent of '2' becomes a coefficient. In words ' Circumference equals two multiplied to 'pi' multiplied to the radius. (NOT radius squared).
