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11 Cards in this Set
- Front
- Back
SIN formula
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opposite leg / hypotenuse
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COS formula
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adj leg / hypotenuse
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you can only use trigonometry with ______ of a triangle.
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the actue angles, never the right angle
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TAN formula
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opposite leg / adjacent leg
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Angle of elevation
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the angle between the line of sight and the horizontal when looking up (the angle in the bottom left of an example right triangle with the right angle on the right)
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Angle of depression
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The angle between the line of sight and the horizontal when looking down (equal to the angle of elevation...on the outside when looking across from the top of the triangle)
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Law of Cosines
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b^2=a^2+c^2-2(a)(c)cos(b
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Law of Sines
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Sin(A / a = Sin(B / b
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to get the interior sum of a convex polygon=
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(n-2)180
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regular polygon
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sides and angles are all congruent
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ways to prove a quadrilateral is a parallelogram
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1) congruent opposite sides
2) congruent pairs of opposite angles 3) Diagonals bisect each other 4) If one pair of opposite sides is both congruent and parallel. 5) consecutive angles are supplementary |