Solve for an angle in a right triangle

Since a right triangle has one known angle (90°) and the sum of a triangles interior angles are 180°, you can take a given angle (like 36°) and add it to 90° and then subtract 180 from it.

Essentially, do the following:
A = 90-givenAngle
A = 180-

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!