Maths Equations

Question 1

Area of a parallelogram

Answer 1

Base x vertical height

Question 2

Area of a trapezium

Answer 2

1/2(a+b)h

Question 3

Exterior angle of a regular polygon

Answer 3

360 degrees/n

Question 4

Sum of interior angles of any polygon

Answer 4

(N-2)x180 degrees

Where n is the number of sides

Question 5

For a circle with radius

Answer 5

Circumference=2 pie

Area=pie r 2

Question 6

Volume of a prism

Answer 6

Cross-sectional area x length

Question 7

Volume of a cylinder

Answer 7

Area of circlexheight=pie r 2 h

Question 8

Surface area of cylinder

Answer 8

2 pie r h + 2 pie 2

Question 9

Compound growth and decay

Answer 9

N=N o (multiplier)n

Question 10

Area of a sector

Answer 10

X degrees /360 degrees x area of a full circle

Question 11

Length of an arc

Answer 11

X degrees / 360 degrees x circumference of full circle

Question 12

Pythagoras theorem

Answer 12

A2 + b2 = c2

Question 13

Trigonometry ratios :

Answer 13

Sin x : opposite/hypotenuse

Cos x : adjacent/hypotenuse

Tan x : opposite/adjacent

Question 14

Compound measure for speed

Answer 14

Speed=distance/time

Question 15

Compound measure for density

Answer 15

Density=mass/volume

Question 16

Compound measure is pressure

Answer 16

Pressure=for example/area