Math Formulas
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Perimeter of a Rectangle | P = 2l + 2w or P = 2(l + w)
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| Perimeter of a Polygon | Sum of all sides
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| Circumference of a Circle | C = 2πr or C = πd
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| Area of a Triangle | A = 1/2bh or A = bh/2
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| Area of a Circle | A = πr to the 2nd power
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| Area of a Square | A = s to the 2nd power
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| Area of a Rectangle | A = lw or A = bh
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| Area of Parallelogram | Base x height
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| Area of a Trapezoid | A = 1/2(a+b)h
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| Volume of a cylinder | V = πr to the 2nd power times h
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| Surface Area of a Cylinder | S = 2πrh + 2πr to the 2nd power or
S = 2πr(h + r)
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| Volume of a rectangular prism | V = (L)(W)(H)
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| Surface Area of a Rectangular Prism | 2(LW + LH + WH)
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| Percent Change | Difference divided by Decimal
(difference/original $ = percent change)
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| Simple Interest | Interest = percent x rate x time
I= ($) x (%) x (years)
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| Ratio for probability | Desire divided by total
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| Rational Numbers | numbers that can be written as a ratio or fraction
("all frats are rats")
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| Irrational Numbers | Cannot be written as a ratio or a fraction
(no bar, no pattern) Example: π - Pi
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| Scientific Notation | a way to easily handle very large numbers or very small numbers
(ex: 0.0000000056 = 5.6 x 10 to the -9 power)
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| Midpoint Value | x1 + x2/2, y1 + y2/2 (subscript↓)
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| Complementary Angles | either of two angles whose sum is 90 degrees
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| Supplementary Angles | either of 2 angles whose sum is 180 degrees
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| Translation | slide
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| rotation | turn
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| dilation | multiply/enlarge/shrink
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| reflection | flip
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| distance/rate formula | d = r x t
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| distance between two points | d=√(x2-x1)2 + (y2-y1)2 (subscript↓)
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| unit cost | total cost/# of items or money/number
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| Slope intercept form | y=mx + b
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| slope formula | rise/run or y2-y1/x2-x1 (subscript↓)
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| Triangle sum theorum | a + b + c = 180
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| Exterior angle theorum | angle A = the sum of 2 remote interior angles of a triangle
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| Pythagorean Theorum | a2 + b2 = c2 (superscript↑)
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| Volume of a cube | v = s3 (superscript) or V = L x W x H
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| Volume of a cone | v = 1/3πr2h (superscript↑)
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| volume of a sphere | v = 4/3πr3 (superscript↑)
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| volume of a pyramid | v = lwh/3
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| surface area of a cube | 6s squared
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| surface area of a cone | a = πr squared + πrL
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| surface area of a sphere | a = 4πr squared
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Created by:
masonteach
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