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WORD DEFINITION DIAGRAM NOTATION WORD DEFINITION DIAGRAM NOTATION Reference Angle Opposite Leg (Rt. Triangle) One of the two acute angles in a right triangle. The leg across from the reference angle in a right triangle. The side that does not for the reference angle. WORD DEFINITION DIAGRAM NOTATION Adjacent Leg (Rt. Triangle) DEFINITION DIAGRAM NOTATION DEFINITION DIAGRAM NOTATION EXAMPLE / EXPLANATION The branch of mathematics dealing with the relations of the sides and angles in a triangle. WORD DEFINITION DIAGRAM NOTATION Sine Ratio EXAMPLE / EXPLANATION The side of a right triangle across from the right angle. It will always be the longest side in a right triangle WORD Trigonometry EXAMPLE / EXPLANATION A leg next to the reference angle in a right triangle. The non-hypotenuse side that forms the reference angle. WORD Hypotenuse EXAMPLE / EXPLANATION EXAMPLE / EXPLANATION For a given reference angle in a right triangle, the sine ratio is the ratio of the side opposite of the reference angle to the hypotenuse. EXAMPLE / EXPLANATION WORD DEFINITION DIAGRAM NOTATION WORD DEFINITION DIAGRAM NOTATION Cosine Ratio Tangent Ratio For a given reference angle in a right triangle, the cosine ratio is the ratio of the side adjacent to the reference angle to the hypotenuse. EXAMPLE / EXPLANATION For a given reference angle in a right triangle, the tangent ratio is the ratio of the side opposite of the reference angle to the side adjacent to the reference angle. EXAMPLE / EXPLANATION