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Geometry formulas
Question | Answer |
---|---|
geometric mean | √axb |
theorem one | altitude from the right angle splits the triangle into 2 similar triangles, both similar to the original triangle |
theorem two word def. | altitude is the geometric mean between the two peices of hypotenuse |
theorem two formula | peice of hyp/altitude=altitude/other peice of hypotenuse |
theorem three word def. | the leg of the triangle is the geometric mean between the whole hypotenuse and the adjacent peice |
theorem three formula | full hypotenuse/leg=leg/adjacent peice |
60,30 tri. hypotenuse | 2x |
60,30 tri. long leg | x√3 |
60,30 tri. short leg | x |
45,45 tri. hypotenuse | x√2 |
45,45 tri. legs | x & x |
SIN | opposite, hypotenuse |
COS | adjacent, hypotenuse |
TAN | opposite, adjacent |