Question

Please help me answer this and the imagine might be a little Blurry just zoom in the help out. Thank you

Answer 1

Explanation:

a = 180 degrees (because they are supplementary, as it says in the given, so their two angles add up to 180 degrees

b = 180 degrees (same reasoning as above)

c = Substitution?

d = m<3

e = m<3

I'm confident with everything except for c. If anyone can fill it in for me, pls do