Formulas Flashcards
Circumference of a circle
C = 2πr
Length of an Arc
L = θ/360 × 2πr
Perimeter of a Sector
P = θ/360 × 2πr + 2r
Area of Triangle
1/2 × bh
Area of a Parallelogram
A = bh
Area of a Trapezium
A = 1/2 × (a + b) × h
Area of a Rhombus or Kite
A = 1/2 × 𝑥y
Area of a Circle
A = πr^2
Area of a Sector
A = θ/360 × πr^2
SA of Cylinder
SA = 2πrh + 2πr^2
Volume of Cylinder
V = πr^2 × h
Volume of a Prism
V = Ah
Volume of a Pyramid
V = 1/3 × Ah
Volume of a Sphere
V = 4/3 × πr^3
SA of Sphere
SA = 4 × πr^2
Percentage Error
% Error = absolute/measurement × 100%
Absolute Error
Abs Error = 1/2 × smallest unit
1 calorie = ?kj
1 calorie = 4.184kj
Trapezoidal Rule
h/2 × (df + dl)
Cone
1/3 × πr^2 × h
Straight Line Depreciation
Depreciation = S = Vo - Dn
Outliers
Outliers = Q1 - 1.5 × IQR
and Q3 + 1.5 × IQR
Simple Interest
I = P × R × N
Gradient
m = Rise / run or y2 - y1/𝑥2 - 𝑥1
Equation of a Straight Line
y = m𝑥 + c
1 metre^3
1m^3 = 1 kL or 1000 L
