2019-10-26T14:47:36+03:00[Europe/Moscow] en true Average, Area of a circle, Circumference of a circle, Arc, Sector, Compound interest, Exponential growth, Exponential decay, Cone volume, Cylinder volume, Cylinder surface area, Regular prism volume, Rectangular prism surface area, Rectangular pyramid volume, Sphere volume, equation of a circle, parabola standard form, Quadratic formula, Rhombus area, Rhombus Perimeter, Trapezoid area, Polygon interior angles, Ratio formula, Direct proportional relationship, Probability, Area of a triangle, Pythagorean Theorem, slope, slope intercept form, % change flashcards
Common math formulas # Common math formulas

• Average
sum/total number
• Area of a circle
πr²
• Circumference of a circle
2πr
• Arc
circumference(central angle/360)
• Sector
area(central angle/360)
• Compound interest
A = P (1 + r/n)^ (nt) A = accumulated amount P = principle r = interest rate expressed as decimal n = compounding per period t = number of periods
• Exponential growth
y = C(1+r)^t y = final amount C = initial amount r = rate of change t = time
• Exponential decay
y = C(1-r)^t y = final amount C = initial amount r = rate of change t = time
• Cone volume
(1/3)πr²h
• Cylinder volume
πr²h
• Cylinder surface area
2πrh+2πr²
• Regular prism volume
lwh
• Rectangular prism surface area
2lw+2lh+2wh
• Rectangular pyramid volume
(1/3)lwh
• Sphere volume
(4/3)πr³
• equation of a circle
(x-h)² + (y-k)² = r² h = x coordinate of the centre point k = y coordinate of the centre point
• parabola standard form
ax² + bx + c
x = [-b ± √(b² - 4ac)}/2a
• Rhombus area
Bh
• Rhombus Perimeter
2b + 2h
• Trapezoid area
A = (b1+b2)½h
• Polygon interior angles
(n-2)180
• Ratio formula
one part/another part
• Direct proportional relationship
one part/whole part = one part / whole part
• Probability
desired outcomes/total outcomes
• Area of a triangle
½bh
• Pythagorean Theorem
a²+b²=c²
• slope
m = rise/run m = ∆y/∆x m = (y₂-y₁)/(x₂-x₁)
• slope intercept form
y=mx+b
• % change
change/original