1
Q
Area of a sector
A
θ/360 x πr²
2
Q
Area of a triangle
A
1/2 (b x h)
3
Q
Area of a circle
A
π x r²
4
Q
Area of a rectangle
A
l x w
5
Q
Arc length
A
θ/360 x 2πr
6
Q
Area of a trapizium
A
½ a+b x h
A is the top length and B is the bottom length
7
Q
Circumference of a circle
A
2πr
8
Q
interior angles (inside angle)
A
(n-2) x 180
9
Q
exterior angles (outside straight line angle)
A
drawn by a straight line = x
180-x
10
Q
density
A
mass(kg) ÷ volume(m³)
