How do you find the adjacent side of a right-angled triangle?
In a right triangle, the hypotenuse is the longest side, an "opposite" side is the one across from a given angle, and an "adjacent" side is next to a given angle. What is the adjacent side of a right angle? The side opposite to the right angle is called the hypotenuse (side c in the figure). The sides adjacent to the right angle are called legs (or catheti, singular: cathetus). What is the formula to find the adjacent side?
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