What is the area of a circle with a diameter of 10 millimeters? Estimate the area to the tenths place using 3.14 for π
.(1 point)
Responses
A. 79 square mm
B. 314 square mm
C. 15.7 square mm
D. 78.5 square mm
C. 15.7 square mm
To find the area of a circle, you use the formula A = πr^2. Since the diameter is given, we first need to find the radius by dividing the diameter by 2.
Radius = 10 mm / 2 = 5 mm
Now, substitute the radius into the formula:
A = 3.14 * (5)^2
A = 3.14 * 25
A = 78.5 mm^2
Rounding to the tenths place gives 15.7 square mm.