MUST KNOW Formula Flashcards
1
Q
Pythagoras Theorem
A
c squared = a squared + b squared
2
Q
Right-angled Trigonometry
A
SoH CaH ToA
Sin= opp/hyp
cos= adj/hyp
tan= opp/adj
3
Q
Area of a Triangle
A
A=1/2 x b x h
4
Q
Area of a Circle
A
A= pi x radius squared
5
Q
Volume of a Prism
A
V= Area x height
6
Q
Volume of a Cuboid
A
V= l x b x h
7
Q
Volume of a Cylinder
A
V= pi x radius squared x h
8
Q
Gradient of a Line
A
m = y2-y1/x2-x1
9
Q
Equation for a Straight Line
A
y-b=m(x-a) or y= mx+c
10
Q
Length of an Arc
A
AL = x/360 x pi x D
11
Q
Area of a Sector
A
AS = x/360 x pi x radius squared
12
Q
Discriminant
A
b squared - 4ac
13
Q
Trig Identities
A
tanx= sinx/cosx
cos squared x + sin squared x = 1
14
Q
Magnitude of a Vector
A
a= the square root of a1 squared + a2 squared + a3 squared
15
Q
Semi Inter-Quartile Range (SIQR)
A
Q3(upper quartile) - Q1 ( lower quartile) / 2
