10 POINTS PLEASE HELP !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
2 answers:
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we know that
If lines f and g are parallel
then
the angle c must be equal to
∠c= ------> by alternate exterior angles
and
∠c+∠d= ------> by supplementary angles
so
∠d=
therefore
<u>the answer is</u>
The angle d should be equal to to prove that f ∥ g