Square/Rectangles = height x base Triangles = 1/2 (base x perpendicular height) Parallelogram= base x perpendicular height Trapezium = 1/2(top+bottom) x height

p(2) = probability of getting a 2 p'(2) = probability of not getting a 2 p(a) + p'(a) = 1 (the probability of something happening + probability of something not happening = 1)

Volume of a cube or cubiod = base x width x height Volume of prisms - find the area of the cross section then multiply by length.