Area of a circle
Cosine Rule
Circumference of a circle
Cos(60) value
Quadratic formula
Sin(30) value
Finding the 3rd side length in a
right-angled triangle
Sin(60) value
Area of a triangle
(2 formulae)
Cos(30) value
The Sine Rule
Tan(45) value
𝑎2 = 𝑏2 + 𝑐 2 − 2𝑏𝑐 × 𝑐𝑜𝑠(𝐴)
A = πr2
C = 2πr
To solve x = ax2 + bx + c
−𝑏 ± √𝑏2 − 4𝑎𝑐
𝑥=
2𝑎
Pythagoras’ Theorem
𝑎2 + 𝑏2 = 𝑐 2
Where c must be the long side
Area = half base times height
1
Area = 2 𝑎𝑏 × sin⁡(𝐶)
𝑎
𝑏
𝑐
=
=
sin⁡(𝐴) sin(𝐵) sin⁡(𝐶)