Need To Know Formulae Flashcards by Sebastian Shen Ridley

Q

Area Rectangle

A

Length x width

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Q

Area Parallelogram

A

Base x hight

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Q

Area Triangle

A

1/2 base x hight

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Q

Area Trapezium

A

Half the sum of the parallel sides times the distance between them

1/2 ( length a + length b) X hight

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Q

Volume Cuboid

A

Hight x length x width

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Q

Volume Prism

A

Area of cross section x length

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Q

Volume Cylinder

A

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Q

Volume Pyramid

A

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Q

Cylinder (curved surface area)

A

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Q

Surface area prism

A

Front + back + rectangular sides

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Q

Surface area Pyramid

A

Base + triangular sides

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Q

Circle circumference

A

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Q

Circle area

A

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Q

Right angled triangles Pythagoras

A

A squared + B squared = C squared

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Q

Trigonometry sin

A

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Q

Trigonometry cos

A

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Q

Trigonometry tan

A

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Q

Quadratic equations

A

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Q

Compound measurements speed

A

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Q

Compound measures density

A

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Q

Compound measures pressure

A

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Q

Estimate for the mean

A

Sum of mid point x frequency
——————————————
Total frequency

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Q

Volume of hemisphere

A

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Q

Curved surface area of a hemisphere

A

Q

Volume of a cone

A

Q

Curved surface area of a cone where L is the slanted Hight

A

Q

Volume of a sphere

A

Q

Surface area of a sphere

A

Q

Area of a sector

A

Q

Arch length of sector

A

Q

Perimeter of sector

A

Q

Triangles area

A

1/2absin( c )

Q

Sum of all exterior angle in polygons

A

360

Q

Sum of all the interior angles polygon

A

180 x n-2
N=number of sides

Q

Exterior angles regular polygons

A

360/N

Q

Centre angle Refular polygon

A

360/N

Q

Interior angle methods 1 RP

A

180(N-2) / N
Gives 1 angle

Q

Interior method 2

A

Ext + int = 180

Q

Triangle 1 exterior of a regular shape

A

120

Q

1 int angle reg triangle

A

60

Q

Sum exterior quadrilateral

A

360

Q

Sum int quad

A

360

Q

Sum ex angles pentagon

A

360

Q

1 ext RS pentagon

A

72

Q

1 int reg shape

A

108

Q

Sum int hexagon

A

720

Q

1 int RS hexagon

A

120

Q

Sum extra angles heptagon

A

360

Q

Sum interior angles heptagon

A

900

Q

1 exterior angle RS octagon

A

45

Q

1 int angle RS octagon

A

135

Q

Sum of the exterior angles nonagon

A

360

Q

Sum int angles nonagon

A

1260

Q

Decagon 1 interior angle RS

A

144

Q

Unagon sum interior angles

A

1620

Q

Dodecagon sum exterior angles

A

360

Q

Dodecagon 1 exterior angle RS

A

30

Q

Sum interior angles dodecagon

A

1800

Q

1 interior angle reg shape dodecagon

A

150