Practice Problems
Problem 1
Problem 2
A = Π (radius)² = 16Π
radius² = 16
radius = 4
Circumference = 2Π × radius = 2Π × 4 = 8Π
Problem 3
Circumference = 2Π(radius) = 26Π
2 × radius = 26
radius = 13
Area = Π(radius)² = Π(13)² = 169Π