# How do I do proofs I can't do them

QUESTION POSTED AT 18/04/2020 - 07:43 PM

QUESTION POSTED AT 18/04/2020 - 07:43 PM

Hi Codyh,

we are given the that angle 1 + angle 2 =180 ==> supplementary

and also angle 3+angle 4 =180 ====> also supplementary

since angle 1 is congruent to angle 4

then angle 3+angle 1 =180

but angle 2+angle 1 = 180 as well

it must be then angle 2 is congruent to angle 3

we are given the that angle 1 + angle 2 =180 ==> supplementary

and also angle 3+angle 4 =180 ====> also supplementary

since angle 1 is congruent to angle 4

then angle 3+angle 1 =180

but angle 2+angle 1 = 180 as well

it must be then angle 2 is congruent to angle 3

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