if the hypotenuse is 12.3 and the adjacent is 6 what is the opposite. c is 90 degrees, a is 60 degrees and b is 30 degrees.

Since this is a right triangle, we can use the Pythagorean theorem to find the missing side.

Let's call the missing side length  " x " .

 

6² + x²  =  12.3²        Subtract  6²  from both sides.

 

x²  =  12.3² - 6²         Simplify

 

x²  =  151.29 - 36

 

x²  =  115.29             Take the positive square root of both sides.

 

x  =  √115.29   ≈   10.737

 

But there is a small disagreement here... the side opposite the 30° must be the side with length  6 .

 

However,  6  is not exactly half of 12.3 . In a true 30-60-90 triangle, the side opposite the 30° angle is half the hypotenuse.

 

So this can't be exactly a 30-60-90 triangle, but it is close.