Jul 25, 2008
| Symbols and Their Meanings | |
| = is equal to | ≤ is less than or equal to |
| ≠ is unequal to | ≥ is greater than or equal to |
| < less than | || is parallel to |
| > is greater than | ⊥ is perpendicular to |
| FORMULAS | |
| DESCRIPTION | FORMULA |
| Area (A) of a: | |
| square | A = s2; where s = side |
| rectangle | A = lw; where l = length, w = width |
| parallelogram | A = bh; where b = base, h = height |
| triangle | A = ½bh; where b = base, h = height |
| circle | A = πr2r = radius |
| Perimeter (P) of a: | |
| square | P = 4s; where s = side |
| rectangle | P = 2l + 2w; where l = length, w = width |
| triangle | P = a + b + c; where a, b, and c are the sides |
| circumference (C) of a circle | C = πd; where π = 3.14, d = diameter = 2r |
| Volume (V) of a: | |
| cube | V = s3; where s = side |
| rectangular container | V = lwh; where l = length, w = width, h = height |
| Pythagorean Theorem | c2 = a2 + b2; where c = hypotenuse, a and b are legs of a right triangle |
| Distance (d) of a: | |
| between two points in a plane |  where (x1, y1) and (x2, y2) are two points in a plane |
| as a function of rate and time | d = rt; where r = rate, t = time |
| between two points in a plane |  |
| Median | median = the point in an ordered set of numbers at which half of the numbers are above and half of the numbers are below this value |
| Simple Interest (i) | i = prt; where p = principal, r = rate, t = time |
| Total Cost (c) | c = nr; where n = number of units, r = cost per unit |
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