area of a rectangle - length x width, area of a triangle - base x height, divide by 2, volume of a cuboid - length x width x height, distance - time x speed, speed - distance divided by time, perimeter - total length around a shape, area of a circle - pi times radius squared, range - highest number - lowest number, mean - total divided by how many numbers there are , median - put numbers in order, pick middle number, percentage change - change divided by original, then x 100, volume of a prism - area of cross section x length,

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