Formulas 3.5 / 5 based on 3 ratings ? MathematicsGCSEEdexcel Created by: Emma HansenCreated on: 08-03-13 17:58 Calculate Profit or Loss New price - Old price ÷ Old price x 100 1 of 28 Circumference of a Circle π d (diameter) 2π r (radius) 2 of 28 Area of a Circle π r 3 of 28 Area of a Sector of a Circle Degree ÷ 360 x π r (cm ) 4 of 28 Length of an Arc of a Circle Degree ÷ 360 x π d (cm) 5 of 28 Volume of a Cylinder π r x h 6 of 28 Surface area of a Cylinder 2π r + 2π r h 7 of 28 Volume of a Pyramid 1/3 x area of base x height 8 of 28 Surface area of a Cone π r l + r x π 9 of 28 Volume of a Sphere 4/3 π r 10 of 28 Surface area of a Sphere 4π r 11 of 28 Pythagoras Theorem a + b = c 12 of 28 Sin Opposite / Hypotenuse 13 of 28 Cos Adjacent / Hypotenuse 14 of 28 Tan Opposite / Adjacent 15 of 28 Right Angles Triangle Pythagoras / SOH CAH TOA 16 of 28 Non Right Angled Triangle Sine Rule / Cosine Rule 17 of 28 Sine Rule When? 2 sides and an opposite to on of the 2 sides OR one side and 2 angles 18 of 28 Cosine Rule When? 2 sides and an angle not opposite to one of the 2 sides OR 3 sides 19 of 28 Sine Rule (length) a / SinA = b / SinB = c / SinC 20 of 28 Sine Rule (angles) SinA / a = SinB / b = SinC / c 21 of 28 Cosine Rule (length) a = b + c - 2bc cosA 22 of 28 Cosine Rule (angles) cosA = b + c - a / 2bc 23 of 28 Area of a Triangle 1/2 ab sin c 24 of 28 Translations Vector (moves but doesn't change) 25 of 28 Rotation How far its moved, Where from , Direction 26 of 28 Reflection Equation of the Line 27 of 28 Enlargement Scale Factor, Centre of Enlargement 28 of 28
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