Find the product mentally. ( r - s )^ 2 2 r^2 - rs - s^2 r^2 - 2 rs + s^2 r^2 - rs + s^2

How do you do this geometry problem

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

Acylinder and its dimensions are shown. which equation can be used to find v, the volume of the cylinder in cubic centimeters?