I cannot see the entire problem, but based on what I can see, vertical angles are involved. Just know that vertical angles are always equal. An example would be that 1 and 3 are vertical. Looking at the problem, the sum of angle 1 and angle 3 is 314. Since angle 1 and angle 3 are equal, angle 1 and angle 3 are both equal to 157. If the question is asking you to solve for angle 4 or 2, then you would use supplementary angles. 180-157 is 23, so the measure or angles 2 and 4 is 23. If the question if something other than what I mentioned, let me know and I will answer that, but I hope what I have helped!
Marcus should have substituted -10for b, not 10 Marcus should have subtracted 4(1)(25) in the square root This equation, when solved correctly, only has one real number solution
