(In reply to
Trouble with the solution by B)
Because, ABC is NOT a right triangle. The 3 sections of angle A are 21.7, 30, and 6.58 degrees. Add these up and you only have about 58 degrees, not 90.
You have 2 sides of right triangle ADM so you can find the 3rd side and the other 2 angles (30 & 60). Missing side is 8.66. You know MC is 11. Quadratic gives 13.99 for missing hypotnuse.
Done!

Posted by Jim
on 20051014 20:38:26 