Question

Prove that if a pair of alternate angles formed by a transversal of to lines is congruent then the two lines are parallel.
Please help.​

Answer 1

I am also learning this at school and we only have to write the lines:

Answer : If a pair of alternate interior angles formed (by the transversal of two lines) are supplementary(their sum is 180 degrees), then the two lines are said to be parallel.

If a pair of corresponding angles formed (by the transversal of two lines) are congruent(equal), then the two lines are said to be parallel.

If a pair of co-interior angles formed (by the transversal of two lines) are congruent(equal), then the two lines are said to be parallel.

Answer 2

Answer:

if a pair of alternative angle formed by a transversal of two lines is concurrent then the two lines are parallel

Step-by-step explanation:

supplementary angle which is of 180 degree