Maths need-to-know formulae

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8 Terms

1
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Parallelogram

= b x h

2
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Trapezium

= ½ (a+b)h where a and b are the lengths of the two parallel sides, and h is the height.

3
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Circumference

= 2πr or πd, where r is the radius and d is the diameter.

4
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Prism

area of cross section x length

5
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Cylinder

= πr²h, where r is the radius of the base and h is the height.

6
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Volume of Pyramid

= 1/3 x area of base x height

7
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Cosine rule

a² = b² + c² - 2bc cos(A), where A is the angle opposite side a.

8
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Area of triangel

= 1/2 ab sin C where a and b are the lengths of two sides and C is the included angle.