a. If you begin with a right triangle with sides a, b, and

c and decrease the right angle so it is an acute angle,
how does compare with ?
b. Answer this question for the situation where you
increase the right angle so that it is obtuse.
I have to use a formula to show the answer.

Compare with what?

Law of Cosines:
c^2=a^2 + b^2 -2abCosineC