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Mathematics Reference Sheet KEY b = base d = diameter h = height r = radius = length A = area w = width C = circumference S.A. = surface area V = volume B = area of base Use 3.14 or 22 7 for Circumference C = d = 2 r Triangle A = 1 2 bh Rectangle A = w Trapezoid A = 1 2 h (b 1 + b 2) Parallelogram A = bh Circle A = r 2 Area Surface Area 1. 2016 HigHer ScHool certificate examination REFERENCE SHEET – Mathematics – – Mathematics Extension 1 – – Mathematics Extension 2 –