Use the correct formula to find an area of a circle. If the diameter is twenty one round to the nearest hundredth place use three point 14
The correct formula to find the area of a circle is:
Area = π * (radius)^2
Given that the diameter is 21, we can find the radius by dividing the diameter by 2:
Radius = Diameter / 2 = 21 / 2 = 10.5
Now, we can substitute this value in the formula:
Area = 3.14 * (10.5)^2
Calculating the area using the given value of π:
Area ≈ 3.14 * 110.25 ≈ 345.87
Rounding to the nearest hundredth place, the area of the circle is approximately 345.87 square units.