Question

prove ab is parallel to cd please answer fast.

Answer 1

Step-by-step explanation:

Given EF || CD Then ,

Sum of interior angles between two parallel sides is always equal to 180°

Then, 165° + ECD = 180°

ECD = 180°-165° = 15°

Now , BCD = 25° + ECD

= 25° + 15° = 40°

Here , ABC = 40° and also BCD = 40°

Then by converse property of Alternate angles which states that if alternate angles between two straight line are equal then the lines are parallel to each other....

Therefore, AB || CD proved....

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