Find the area of the circle

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

Find the volume of the solid whose base is the region bounded by f(x), g(x) and the x-axis on the interval [0, 1], and whose cross-sections perpendicular to the y-axis are squares. your work must show the integral, but you may use your calculator to evaluate it. give 3 decimal places for your answe

(-y to the power of 2 - 4y- to the power of 2 -6 y +3)