maths mock equations

midpoint

(x1+x2/2, y1+y2/2)

Equation of a line

y=mx+c

gradient

change in y/change in x

y2-y1/x2-x1

tan(x)

sin(x)/cos(x)

sum of interior angles

(n-2)x180

Area of a parallelogram

base x height

area of trapezium

a+b/2 x h

area of circle

πr²

Circumference of a circle

2πr or πd

Area of a prism

Area of cross section x length

Volume of a cylinder

V=πr²h

Volume of a Sphere

4/3πr³

Surface area of a sphere

4πr²

volume of cone

1/3πr²h

Curved surface area of a cone

πrl

Volume of a pyramid

1/3 x area of base x height

Area of a sector

Area of a Sector = (central angle/360) x πr²

arc length

2πrθ /360

volume of frustum

volume of big cone - volume of small cone

size of one exterior angle

360/number of sides

Density

mass/volume

Quadratic Formula

x = -b ± √(b² - 4ac)/2a

sine rule (side)

a/sinA = b/sinB = c/sinC

area of non right angles triangle

1/2 ab sin c

cosine rule ( side)

a² = b² + c² - 2bcCosA

Cosine rule (angle)

CosA = b2 + c2 - a2 / 2bc

frequency density

frequency/time

surface area of cylinder

2πrh+2πr²