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
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The radius of the circle is half of the diameter, so it would be 10/2 = <<10/2=5>>5 millimeters.
The formula for the area of a circle is A = πr².
Substituting the given values:
A = 3.14 * 5²
A = 3.14 * 25
A ≈ 78.5
Therefore, the area of the circle is approximately 78.5 square millimeters.