Question

Line AB and line CD are two line segments perpendicular to lines l and m both , where l || m . If length of line AB = 3 cm , find line CD .

Answer 1

Step-by-step explanation:

The segment AB is perpendicular to the segment CD because the two angles it creates (indicated in orange and blue) are each 90 degrees. The segment AB can be called the perpendicular from A to the segment CD, using "perpendicular" as a noun.