Question

what are the lines and angles pairs

Answer 1

Special names are given to pairs of angles whose sums equal either 90 or 180 degrees. A pair of angles whose sum is 90 degrees are called complementary angles. Each angle is the other angle's complement. Likewise, if two angles sum to 180 degrees, they are called supplementary angles.

Lines....
a long thin mark on the surface of something or on the ground