State whether a triangle formed with sides having the lengths named is acute, right, or obtuse.
How the heck can I solve this? Please explain!
Let us use law of cosines, because you have a better chance of hearing of it.
#1] Let a=3 b=4 and c=6.
Then, we can find all the angles of this triangle.
Say angle A.
You can solve for cos(A) and then take arccos to get the angle.
Now do that will all angles.
Then you can determine whether the triangle if acute or not.