How do you find area of a circle to the nearest tenth?

Answer 1

That's two different problems. The area of a circle can be found by using one of three formulas, depending on what value you know.

If you know the radius, A = pi x r2

If you know the diameter, A = (pi/4) x D2

If you know the circumference, A = C2 /4pi

That leaves the rounding.

To round a number to a particular digit, look at the digit immediately to the right of your target, in this case, the hundredths place. If that digit is 4 or lower, zero it and everything to the right of it out. If that digit is 5 or higher, increase the target digit by one and zero everything to the right of it out. If your target digit is a 9, increasing it will turn it to zero and increase the digit to the left of it by one.