Measurement and Finance Formulae Flashcards
1
Q
Perimeter of a Rectangle
A
P=2(l+w)
2
Q
Circumference of a circle
A
C=2πr
3
Q
Perimeter of sector (arc length only)
A
l=θ/360×2πr
4
Q
Perimeter of sector
A
l=θ/360×2πr +2r
5
Q
Area of a square
A
A=s^2
6
Q
Area of a rectangle
A
A=lw
7
Q
Area of a parallelogram
A
A=bh
8
Q
Area of trapezium
A
A=1/2 (a+b)h
9
Q
Area of circle
A
A=πr^2
10
Q
Area of sector
A
A=θ/360 πr^2
11
Q
Area of a triangle
A
A=1/2 bh
12
Q
Heron’s Formula for area of triangle
A
A=√(s(s-a)(s-b)(s-c))
where: s=1/2(a+b+c)
13
Q
Surface area of a sphere
A
SA=4πr^2
14
Q
Surface area of a cylinder
A
TSA=2πr^2+2πrH
15
Q
Surface area of a cone
A
TSA=πr^2+πrs
