How do you find the angles of a triangle given sides 9, 6, and 14?
1 Answer
Jul 8, 2017
The angles are
Explanation:
Firstly, Is it a right-angled triangle?
Check using Pythagoras's Theorem.
No
Use the Cosine rule to find the biggest angle first - that will tell you whether the angle is acute or obtuse.
Now use the Sine rule:
Use the sum of the angles to find the third angle: