Ineed to find the mean of this it's really hard for me

Select the lengths in centimeters that would form a right triangle

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)

If wxyz is a square, which statements must be true?