Math notes for 8th Grade By Luke In this page you will see some 8th grade formulas to help you study and more! This the more advanced side of 8th grade math so be prepared! Volumes of Prisms: Rotation: A rotation is a geometric transformation that turns a figure around a fixed point (center of rotation) by a specific angle and direction, creating a congruent image. Key rules involve rotating clockwise or counterclockwise around the origin (0,0).Common applications include gears, wheels, and rotational symmetry in design. Formulas to Use: Volume of Cylinders: π x R squared x H Ex: V= π (4) squared x 10 V= 16π x 10 V= 160 π (Best — Exact) Also good 160 x 3.15= 520.4 Base Numbers to Rational Roots: Ex: 4 5/2 = ____ ( 4 1/2 ) 5 = 32 4. Scientific Notation: