I have a right angle showing 1/6 how do I figure out what the rest of it equates to

A right angle is 90 degrees you have to put 1/6 into a decimal.

1/6 = 0.166666667

So you would go 90 degrees minis 0.1666666667 to get your answer.

90-0.1666666667=89.833333334

So 89.8333333334 degrees is missing of your right angle.