I need help please. Thank you.

Two sides of a triangle mesure 20cm and 30cm. what is the measure of the third side

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

Prism m and pyramid n have the same base area and the same height. cylinder p and prism q have the same height and the same base perimeter. cone z has the same base area as cylinder y, but its height is three times the height of cylinder y. the figures and have the same volume.