Find the circumference and area of the circle. Express answers in terms of pi
and then round to the nearest tenth. with a the circle being 18yd.
Circumference = 2πr = 2π(9) = 18π ≈ 56.5 yd
Area = πr^2 = π(9)^2 = 81π ≈ 254.5 sq yd
To find the circumference of a circle, we can use the formula:
Circumference = 2 * π * radius
Given that the radius (r) is 18 yards, we can substitute this value into the formula:
Circumference = 2 * π * 18
Calculating this, the circumference is approximately 113.1 yards (rounded to the nearest tenth).
To find the area of a circle, we can use the formula:
Area = π * radius^2
Substituting the value of 18 yards for the radius (r):
Area = π * (18)^2
Evaluating this, the area is approximately 1017.9 square yards (rounded to the nearest tenth).