sorry it's been a while sense i took this class

Question

h t t p :/ / i mg 3 9 . i m a g e sh a c k . u s/ i m g 3 9 / 1 3 4 0 / 5 4 5 7 6 9 9 4 . j p g

Answer 1

C and B are complimentary (add to 90 deg)
c and B are complimentary
therefore, C=c

That is the proof of alternate interior angles are equal...

Answer 2

Thanks =]

what about the physics triangle

Answer 3

How do we know that C and B are complementary I'm trying to prove that for triangles (in this case a right triangle) that the sum of all of the their angles add up to 180

also what about the physics tiranlge