The area of a circle can be found using the formula A = πr^2, where π is the constant pi and r is the radius of the circle.
Given that the diameter of the circle is 10 mm, the radius would be half of the diameter, which is 5 mm.
Using the given approximation of π as 3.15 and substituting the radius value into the formula, we have:
A = 3.15 * (5 mm)^2
A = 3.15 * 25 mm^2
A ≈ 78.75 mm^2
Rounding this value to the tenths place, the estimate for the area of the circle is 78.8 square mm.
Therefore, the correct answer is not listed among the options.
What is the area of a circle with a diameter of 10 millimeters? Estimate the area to the tenths place using 3.15 for π.
1. 15.7 square mm
2. 314 square mm
3. 78.5 square mm
4. 79 square mm
3 answers
pick one answer please bot
If I must choose one answer from the given options, the closest estimate to the actual area of the circle is 79 square mm (option 4).
1 answer