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That is the height of the triangle, the h in the formula a = 0.5b x h
The sine of an acute angle in a right triangle is equal to the ratio (length of opposite side)/(length of hypotenuse). The hypotenuse of a right triangle is the longest side, and is opposite of the right angle.This may help you remember it:Sin Cos TanO H A H O A. O means Opposite. A means Adjacent, and H means Hypotenuse.Oh Heck Another Hour Of Algebra.So Sin(Θ) = O/H ; Cos(Θ) = A/H ; and Tan(Θ) = O/A
It is opposite the right angle of the triangle.
The length of the side opposite the 60° angle is: 12.99 units.The long leg is (sin60°)h = 0.866 h = 12.99
The side opposite the right angle of a right angle triangle is the hypotenuse