





Vocabulary
Trigonometry: The study of triangle with emphasis on calculations involving the lengths of the sides. SOHCAHTOA: An acronym that helps to remember the relationship between and angle and its sides. Hypotenuse: The side across from the right angle. The longest side of a triangle. Pythagorean Theorem: . Where a and b are the legs of the triangles and c is the hypotenuse of a triangle. Shows the relationship between the sides of a triangle. Law of sines: Equations relating the sines of angles and the corresponding opposite. Law of cosines: An equation relating the cosine of an angle and the lengths of the sides of a triangle. Angle of Elevation: The angle, above horizontal, that an observer must look to see an object that is higher than the observer. Angle of Depression: The angle, below horizontal, that an observer must look to see an object that is lower than the observer. 