SOLUTION: find all the angles of a triangle with the given information or answer "no triangle" and explain why. You have a triangle with sides a = 6, b = 9, c = 12. What are angle A, B, an

Algebra ->  Trigonometry-basics -> SOLUTION: find all the angles of a triangle with the given information or answer "no triangle" and explain why. You have a triangle with sides a = 6, b = 9, c = 12. What are angle A, B, an      Log On


   



Question 869009: find all the angles of a triangle with the given information or answer "no triangle" and explain why.
You have a triangle with sides a = 6, b = 9, c = 12.
What are angle A, B, and C?
I know the formulas SAA, ASA, and SSA but they don't work on this question.

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Use the Cosine Law.
c%5E2+=+a%5E2+%2B+b%5E2+-+2ab%2Acos%28C%29