I am having trouble solving this Hinge Theorem Geometry proof. I understand the Hinge Theorem, but how is m<1 congruent to m<2?
1 Answer
Jan 26, 2018
Please see below.
Explanation:
We can use cosine formula for triangles.
We have
also
and as both angles are less than
Now using cosine formula in
and in
Compare RHS of (A) and (B),
we have
i.e.