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Geometry Formulas |
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| Perimeter | P = sum of sides |
| Area of a triangle | A = ½bh |
| Area of a rectangle | A = lw |
| Area of a parallelogram | A = bh |
| Area of a trapezoid | A = ½·(b1 + b2)·h |
| Area of a circle | A = πr2 |
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Word Problem Formulas |
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| Distance | Distance = rate X time |
| Interest | Interest = principal X rate X time |
| Compound Interest |  |
| Work accomplished | work accomplished = (rate of work) X (time worked) |
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Graphing Formulas |
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| Distance (for graphs) |  |
| Midpoint |  |
| Slope |  |
| Slope-Intercept Form | y = mx + b |
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Quadratic Equations |
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| Standard Form | ax 2 + bx + c = 0 |
| Difference of squares | x 2 - b 2 = (x + b)(x - b) |
| Quadratic formula |  |
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Conic Sections |
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| Circle | Centered at (h, k) with a radius of r: |
| (x - h)2 + (y - k)2 = r 2 | |
| Ellipse | Centered at (h, k) with its major axis parallel to the x-axis: |
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| Centered at (h, k) with its major axis parallel to the y-axis: | |
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| Parabola | If parabola opens vertically: |
| y = a(x - h)2 + k | |
| If parabola opens horizontally: | |
| x = a(y - k)2 + h | |
| Hyperbola | If transverse axis is horizontal: |
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| If transverse axis is vertical: | |
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Sequences and Series |
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| Arithmetic Sequence | an = a1 + (n - 1)d |
| Geometric Sequence | an = a1 r n-1 |
| Arithmetic Series |  |
| Geometric Series |  |
