What is the perimeterand area of a circle?

Answer 1

Ok,

To find the Perimeter of a circle, you must use the formula;

P = 2 * (PI) * r

where P = Perimeter

PI is the constant (approx. 3.14159)

& r is the radius of the circle.

As the diameter of the circle is double the radius, you can also say;

P = d * (PI)

Note: * means 'multiplied'.

(Perimeter, is the distance around the outside of a circle.)

To find area of a circle, you need to use the equation;

A = (PI) * r^2

A = Area

^ = to the power of.

i.e The area of the circle equals the radius squared times the constant PI. (Area, is what is contained within the circles perimeter.)

Hope this helped!

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