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41 Cards in this Set
- Front
- Back
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Angles of a right Triangle with one leg half the hypotenuse?
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30 - 90 - 60
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Reciprocal of a?
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1/a
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Product of any number and its reciprocal?
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1
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(b^m)(b^n)
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b^m+n
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(b^m)/(b^n)
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b^m-n
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(b^m)^n
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b^mn
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(b^m)(c^m)
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(bc)^m
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11^2
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121
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12^2
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144
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13^2
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169
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14^2
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196
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15^2
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225
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16^2
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256
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Cross Multiply
1/3 ? 3/8 |
Since 8 < 9
1/3 < 3/8 |
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Cross Multiply
3/8 ? 45/120 |
8 * 45 = 3 * 120
so 3/8 = 45/120 |
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20 / (2/3) = ?
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20 * 3/2 = 30
To divide multiply by reciprocal |
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Deviation
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difference from the average
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(x - y)(x + y)
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x^2 - y^2
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(x - y)^2
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(x^2) - 2xy + y^2
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(x + y)^2
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(x^2) + 2xy + y^2
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Sides with the same length are opposite __________ angles
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equal
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a^2 + b^2 = c^2 if
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triangle is a right triangle
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a^2 + b^2 < c^2 if
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if triangle is obtuse
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a^2 + b^2 > c^2 if
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if triangle is acute
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Right Triangle for positive number x
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3x, 4x, 5x
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5, 12, ?
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13 ... must know triangle
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In 45 45 90 triangle sides = ?
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x, x , x^1/2 = sqrt(x)
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In 30 90 60 triangle
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x = little
2x = hypotenuse x*(sqrt3) = long |
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In non right triangle the sum of 2 sides is _________ than the other
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always greater
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In non right triangle the difference of 2 sides is _________ than the other
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always less
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Area of triangle?
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1/2 * bh
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Area of equilateral triangle?
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((s^2)*sqrt3)/4
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Sum of n angles in polygon of n sides?
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(n - 2) * 180
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Area of parallelogram?
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A = bh
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Area of square by diagonal
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A = 0.5 d^2
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Area of trapezoid?
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A = 0.5 (base1 + base 2)height
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Circumference?
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2piR
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Arc length of angle x?
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(x/360)(2piR)
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Area of sector fromed by arc with angle x?
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(x/360)(piR^2)
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Area of cube?
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A = 6e^2
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Slope =
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(y2 - y1)/(x2 - x1)
rise over run |
