I have no idea how to find the exact area and approximate area of a circle...

Question

The diameter is 13 ft

1) The exact area is? Then it asks feet, square feet, or cubic feet. It also says type an exact answer in terms of pi. Use integers or decimals for any numbers in the expression.

2) The approximate area is? Then it asks feet, square feet, or cubic feet. It also says simplify your answer. Type an integer or a decimal.

Answer 1

The area of a circle, A, is π r², where r is the radius of the circle. If you are given the radius of a circle, you can find its area. If you are given the area, you can find its radius. Pi (π) is a constant. Leave the symbol for pi in your formula to express the EXACT area. If you want an approximate area, use 3 or 3.14, depending on how close an approximation you want. When you use however precise a decimal that you decide for pi, then use that value to multiply by r² to get your APPROXIMATE area for the circle.

As far as the units, area is expressed in square units. For instance, if the radius is expressed in inches, then the area of the circle will be in square inches.

Answer 2

A = (d/2)²π ft²

A = (6.5)²π ft²

A ≈ (6.5)²(3.14159)