Download Reference Angle One of the two acute angles in a right triangle

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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.
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Adjacent Leg (Rt.
Triangle)
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The branch of mathematics dealing with the relations of the sides and angles in
a triangle.
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Sine Ratio
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The side of a right triangle across from the right angle. It will always be the
longest side in a right triangle
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Trigonometry
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A leg next to the reference angle in a right triangle. The non-hypotenuse side
that forms the reference angle.
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Hypotenuse
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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.
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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.
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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