If one side is 3 units, and the other is 4 units, then it will be 16 plus 9 equals 25, and the square root of twenty five is five, so it will be five.
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The sine of an angle in a right triangle is opposite/hypotenuse, where opposite is the only side that is not adjacent to the angle you want to find the sine of, and the hypotenuse is the side opposite the right angle in the triangle. Just find opposite/hypotenuse.
Sin is the opposite over the hypotenuse.
Pythagorean Theorem: a2 + b2= c2 where c is the hypotenuse of a right triangle. Hypotenuse is the side of a right triangle opposite to the right angle.
Sin is sin-1(opposite/hypotonose)
It is the angle opposite the hypotenuse which measures 90 degrees