equations

Question 1

area of a right angle triangle

Answer 1

base x height
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2

Question 2

area of a trapezium

Answer 2

h ( a + b )
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2

Question 3

area of a circle

Answer 3

pi x r^2

Question 4

circumference of a circle

Answer 4

pi x d

Question 5

volume of a cube

Answer 5

L x W x H

Question 6

area of prisms

Answer 6

cross section area x length

Question 7

area of a cylinder

Answer 7

pi x R^2 x H

Question 8

volume of spheres

Answer 8

4 x pi x R^3
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3

Question 9

surface area of spheres

Answer 9

4 x pi x R^2

Question 10

volume of a cone

Answer 10

pi x R^2 x H
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3

Question 11

curved surface area of a cone

Answer 11

pi x R x L

Question 12

volume of a pyramid

Answer 12

1/3 x area of base x H

Question 13

density equation

Answer 13

mass
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volume

Question 14

speed equation

Answer 14

distance
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time

Question 15

pressure

Answer 15

force
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area

Question 16

area of any triangle

Answer 16

1/2 x A x B x Sin(0)

Question 17

equation of a circle

Answer 17

x^2 + y^2 = R^2

Question 18

sum of interior angles for a regular polygon

Answer 18

(number of sides - 2) x 180

Question 19

interior angles if a regular polygon

Answer 19

(number of sides - 2) x 180
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number of sides

Question 20

exterior angle of a regular polygon

Answer 20

360
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number of sides

Question 21

depreciation

Answer 21

original x ( 1 - percentage )
/////////////////////////////// ^ of time
100

Question 22

percentage change

Answer 22

new - original
——————– x 100
original

Question 23

length of diagonal across a cuboid

Answer 23

d^2 = a^2 + b^2 + c^2

Question 24

area of a sector

Answer 24

angle
////////. x pi x R^2
360

Question 25

length of an arc

Answer 25

( pi x D ) x angle/360

Question 26

transforming graphs

when the instruction is outside the bracket of x what coordinate is changing
eg: -f(x)

Answer 26

the y coordinate

Question 27

transforming graphs

when the instruction is inside the bracket of x what coordinate is changing
eg: f(-x)

Answer 27

the x coordinate

Question 28

transforming graphs

when adding or subtracting when the instructon on inside the bracket of x, what happenes
eg f(x-4)

Answer 28

you do the opposite to the x value

so eg you + 4 to the x value