What is the measure of an angle in parallel lines?
We will use the concept of angle to find the measure of an angle in parallel lines.
Answer: The angle between parallel lines is either undefined or 0 or 180 degrees.
The parallel lines never meet or intersect each other and no angle is formed as the distance between two lines is constant throughout.
An angle is formed when lines meet. Parallel lines never meet, so, there is no angle formed and we can say it is undefined.
The only case where we can say the angle formed is 0 or 180 degrees is when the distance between them is 0. So, if a pair of parallel lines superimpose over each other, then the angle formed is 0 or 180 degrees (0 if they are in the same direction, 180 if they are in opposite direction)