Supplementary angles add to 180 degrees. If A and B are both supplementary to C, the two angles must be congruent since A=B=180-C.
The first question 10 and the next one is 40 the next one is 30
About 425 feet, a^2*b^2=c^2, so 90,000+90,000=180,000 and the square root of 180,000 is about 424.
I think you divde the fractions
