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Trigonometric Trivia What does the word Trigonometry mean? • • • • A. B. C. D. The study of algebra The study of angles The study of triggerfish The study of triangles • The answer is D. Trigonometry means the study of triangles. On what does trigonometry depend? • • • • A. B. C. D. Chords of a circle Radius of a circle Properties of similar triangles Rotation of the sun • The answer is C. Trigonometry depends on the properties of similar triangles. By convention, what Greek letter is used to label a trigonometric angle? • • • • A. B. C. D. Gamma The letter X Beta Theta • The answer is D. The Greek letter Theta, θ , is used to label unknown angles. Which of the following is not a trigonometric function? • • • • A. B. C. D. Sine Tangent Secant Radian • The answer is D. There are 6 trig functions, sine, cosine, tangent, cosecant, secant, and cotangent. On what does the ratio of the legs of a right triangle depend? • • • • A. B. C. D. The non-right angles of the triangle The size of the triangle The perpendicular bisector The right angle • The answer is A. The ratio of the legs of a right triangle are determined by the size of the non-right angles in the triangle. Who is called the founder of trigonometry? • • • • A. B. C. D. Pythagoras Hipparchus Gunter Menelaus • The answer is B. Hipparchus is called the founder of trigonometry.