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        | An angle formed by a horizontal line and the line of sight to an object below the level of the horizontal. |  | 
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        | An angle formed by a horizontal line and the line of sight to an object above the level of the horizontal. |  | 
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        | For an acute angle of a right triangle, this is the ratio comparing the adjacent leg and hypotenuse |  | 
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        | For any numbers a and  b, the positive number x such that a/x = x/b |  | 
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        | In a right triangle, the sum of the squares of the legs equals the sum of the square of the hypotenuse. |  | 
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        | A set of numbers a, b, and c, that satisfy the pythagorean equation (a^2 + b^2= c^2) |  | 
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        | For an acute angle of a right triangle, the ratio of the opposite leg and the hypotenuse |  | 
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        | For an acute angle of a right triangle, the ratio of the opposite leg and the adjacent leg |  | 
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        | A ratio of the measures of two sides of a right triangle |  | 
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        | The study of the properties of triangles and trigonometric functions and their applications |  | 
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