SOLUTION: Given triangle ABC and side a = 20; side b = 21. Find the measurement of angle A if angle B is a right angle. I need the answer and steps to this problem so I can use it to answ

Algebra ->  Triangles -> SOLUTION: Given triangle ABC and side a = 20; side b = 21. Find the measurement of angle A if angle B is a right angle. I need the answer and steps to this problem so I can use it to answ      Log On


   

Question 463288: Given triangle ABC and side a = 20; side b = 21. Find the measurement of angle A if angle B is a right angle. I need the answer and steps to this problem so I can use it to answer the rest of them. Thank you.
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
sin(A) = 20/21
A =~ 72.25 degrees