What is the exact area of a circle with a diameter of 18 feet?
1 answer:
The formula for the area of a circle is
We know the diameter, and the radius is half of the diameter. So the radius is 9. Now we plug that into the formula.
So the answer is B, 81 pi square feet
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Answer:
4.8
Step-by-step explanation:
took test
A = (1/2)bh [b = 10 m, h = 6 m]
A = (1/2) * 10 * 6 = 30 m²
Use the Pythagorean therm , you know the a^2+b^2=c^2
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