Question

Find the area of each circle. Round to the nearest tenth. Use 3.14 or 22/7 for PI

diameter=10.5
please help and explain how to do it thanks.

Answer 1

do Pi × 10.5 cz area of a circle is Pi×Diameter

Answer 2

We need to make the diameter in half so we can square it. So 10.5 divided by 2 is 5.25. Now we square 5.25, the radius to get 27.56 (rounded). After we square the radius, we multiply by 3.14. So 27.56 times 3.14 is 86.5 square units. (rounded).