Area Of A Circle Resources

I have a circumference of 28cm. I want to find the area. I know the formula for area but I'm getting stuck on the 28cm. Is that the diameter or radius? If the question was asking me to find the radius,...

In order to know how many bricks to buy, the homeowner must know the distance around the outside of the pit. Calculate both the exact distance and the approximate distance. In order to know how much...

we know that the circumference of the circle is 2(pi)r so if we draw lines from each point to the centre then we should get the area of the circle and it should be 2*(pi)*r*r , ;) instead of (pi)*r*r...

A wet bicycle tire leaves a trace of water on the floor. The tire has a radius of 14 inches, and the bicycle wheel makes 3 full rotations before stopping. How long is the trace of water left on the...

Please help this is a part of my practise test i am only seeing my teacher in 3 days and i would like to know how to do it or if i am doing it wrong

A circular hot tub with diameter of 15ft sits inside a square platform that measures 20ft on a side to the nearest whole number what is the area of the platform surface around the tub