How do you find the circumference of a circle?
How do you calculate the circumference of a circle?
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If the radius of a circle is 30, what is the circumference?
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math what is
Question by rhanaway (14)
I have the hardest time remembering the formula for a circle.
Answer by esteban (1334)
The formula for the area of a circle is A = pi*r*r. r is the radius and pi is about 3.14159. The formula for the circumference is C = 2*pi*r.
Answer by VB (361)
Equation of a circle: (x-h)^2 + (y-k)^2 = r^2 Perimeter of a circle: P = 2*pi*r = pi*d Area of a circle: A = pi*r^2
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