How to solve two step equations with fractions for eighth grade n- gen math homework

What is the approximate circumference of the circle shown below?

Triangle xyz has vertices x(1,3), y(0,0)

Which is the correct first step in finding the area of the base of a cylinder with a volume of 26x cubic meters and a height of 6.5 meters? v=bh 6.5=b(26x) v=bh v=26pi+(6.5) v=bh v=26pi(6.5) v=bh 26pi=b(6.5)