Question

complete the paragraph proof
given: <1 and <2 are supplementary and <2 and <3 are supplementary
Prove: <1 is congruent to <3
By the definition of supplementary angles, M<1+M<2=?
M<2+M<3=?
M<1+M<2=M<2+M<3
subtract M<2 from each side, You get M<1=? or <1is congruent to? Please help I do not understand this at all, all help is greatly appreciated!

Answer 1

So by def. of supplementary angles
<1+<2=180. And <2+<3=180
By transitive,
<1+<2= <2+<3
Subtract <2 on both sides
And you're left with
<1=<3

Answer 2

THANK YOU!

Answer 3

No problem