maths equations

area of parallelogram

wh (width x perpendicular height)

area of trapezium

1/2 (sum of parallel sides) x (perpendicular height)

volume of cylinder

pi x r^2 x l

surface area of cylinder

(2 x pi x r^2) + (2 x pi x r x l)

volume if pyramid

1/3 x area of base x perpendicular height