what is the area of a circle with a diameter of 10 millimeters estem the area to the tenths place using 3.1 for pie
The radius of the circle is half the diameter, so the radius is 5 millimeters.
The area of a circle is calculated using the formula A = πr^2.
Plugging in the values with π being approximated as 3.14:
A = 3.14(5)^2 = 3.14(25) = 78.5 square millimeters
Rounded to the tenths place, the area of the circle is 78.5 square millimeters.