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# Geometry

### Unit 3

TermDefinition
Adjacent side In a right triangle, for each acute angle in the interior of the triangle, one ray forming the acute angle contains one of the legs of the triangle and the other ray contains the hypotenuse. This leg on one ray forming the angle is called adjacent side.
Sine of 0 = sin0 =length of opposite side/length of hypotenuse
consine of 0 = cos0 =length of adjacent side/length of hypotenuse
tangent of 0 = tan0 =length of opposite side/length of adjacent side
Angle of depression The angle below horizontal that an observer must look to see an object that is lower than the observer.
Angle of Elevation The angle above the horizontal that an observer must look to see an object that is higher than the observer.
Complementary angles Two angles whose sum is 90*. Each angle is called the complement of the other.
Opposite side In a right triangle, the side of the triangle opposite the vertex of an acute angle is called the opposite side relative to that acute angle.
Similar triangles Triangles are similar if they have the same shape but not necessarily the same size.
Created by: eric.brock