diameter = 2r
area = pi*r^2
Chat with our AI personalities
By dividing the diameter by 2 will give the circle's radius. Area of any circle = pi*radius squared.
The question is in really bad english, but I'm guessing your meant: 'How do I work out the diameter using pi?' Diameter= Radius2 You don't need to use Pi to work out the diameter. Unless you have a question that doesn't show you the radius. Then you do Area divided by Pi which equals the Diameter.
The area of a circle with a diameter of 9.4 m is: 69.4 m2
A diameter is a line, and has no area.A circle whose diameter is 8.5 has an area of 56.745. (rounded)
Divide the area by pi (= 3.14159 approx) to get diameter.