Sarah said that 0.00001 is bigger than 0.001 because the first number has more digits to the right of the decimal point. I know she's wrong, but how would you explain this using the powers of ten and a number line?

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).