Measurement and Finance Formulae Flashcards
Perimeter of a Rectangle
P=2(l+w)
Circumference of a circle
C=2πr
Perimeter of sector (arc length only)
l=θ/360×2πr
Perimeter of sector
l=θ/360×2πr +2r
Area of a square
A=s^2
Area of a rectangle
A=lw
Area of a parallelogram
A=bh
Area of trapezium
A=1/2 (a+b)h
Area of circle
A=πr^2
Area of sector
A=θ/360 πr^2
Area of a triangle
A=1/2 bh
Heron’s Formula for area of triangle
A=√(s(s-a)(s-b)(s-c))
where: s=1/2(a+b+c)
Surface area of a sphere
SA=4πr^2
Surface area of a cylinder
TSA=2πr^2+2πrH
Surface area of a cone
TSA=πr^2+πrs
What does mL equal
1 cm^3↔1 mL
What does kL equal
〖1 m〗^3 ↔1 kL
Volume of any prism
V=CSA x H
Volume of a pyramid/cone
V=1/3 AH
Volume of a sphere
V=4/3 πr^3
What is the formula for simple interest
I = PRT/100
What’s the formula for compound interest
A = P(1+r)n
What’s the formula for the depreciation of an object
A = P(1-r) n
Perimeter of a Square
P=4s
