Question

If two lines ab and CD are perpendicular to the same line if then a b and CD are

Answer 1

Answer:

Ab and CD are parallel too each other

Step-by-step explanation:

The figure goes like

As sum of co interior angles is 180 (90+90)

hence the two lines are parallel

Answer 2

ab & cd are parallel line ( and in one case they can be same line as well)

Step-by-step explanation:

If two lines ab and CD are perpendicular to the same line

Then ab & cd are either the same line

or they are perpendicular to each other

as ab is perpendicular to a line

so angle with lines are 90°

similarly

cd is perpendicular to a line

so angle with lines are 90°

=> Alternate angles are equal

hence ab & cd are parallel line ( and in one case they can be same line as well)

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