trigonometry ratios
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Trigonometric Ratios
If one of the angles of a triangle is 90º (a right angle), the triangle is called a right angled triangle. We indicate the 90º (right) angle by placing a box in its corner.) Because the three (internal) angles of a triangle add up to 180º, the other two angles are each less than 90º; that is they are acute.
(SEE THE DIAGRAM) In the above triangle, the side H opposite the right angle is called the hypotenuse. Relative to the angle θ, the side O opposite the angle θ is called the opposite side. The remaining side A is called the adjacent side.
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