Maths equations

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Area of a square, rectangle and parallelogram

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A list of maths equations -GCSE level😕😕

30 Terms

1

Area of a square, rectangle and parallelogram

bh

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2

Area of a trapezium

h(a+b)/2

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3

Area of a triangle

½bh

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4

Area of a circle

πr²

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5

Area of a sector

θ/360πr²

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6

Circumference of a circle

2πr

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7

Length of an arc

θ/360πd

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8

multiplier

100±percentage/100

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9

Compound interest

Amount= initial amount x multiplierⁿ

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10

Simple interest

percentage x amount x years

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11

Percentage change

Actual amount/original amount x 100

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12

Sum of interior angles of an n-sided polygon

(n-2)180°

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13

Exterior angle of an n-sided polygon

360/number of sides

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14

Pythagoras' theorem

c²= a²+b²

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15

Volume of a prism

Area of cross section x length

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16

Linear equation

y= mx+c

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17

Gradient

change in y/ change in x

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18

Midpoint of a line segment

(x₁ + x₂ /2 , y₁ + y₂/2)

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19

Quadratic equation

ax²+bx+c

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20

Circle graph

x²+y² = r²

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21

Volume of a cylinder

πr²h

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22

Surface area of a cylinder

2πr²+2πrh

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23

Volume of a pyramid

1/3 x base area x height

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24

Surface area of a pyramid

Area of base + area of all other sides

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25

Volume of a cone

1/3πr²h

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26

Curved surface area on a cone

πrL

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27

Surface area of a cone

πrL + πr²

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28

Density

Mass/volume

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29

Pressure

Force/area

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30

Speed

Distance/time

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