pi=3.14 or 22/7
1.Find the raidus of a circle you were given. If given diameter, divide by 2.
2.write the foumula A=Pi r2.Ex: A=3.14*5 to the second
3. Substitute the values from the problem into the formula where they go. Use the value pi that you are asked to use.
4.Solve for unknown.3.14*5 to the second is 78.5 to the second
