Answer:
In engineering, construction, and technical fields
Step-by-step explanation:
The use of parallel lines has many wide applications
For example, the parallel lines are important in science in preventing parallax errors in measuring, say the meniscus of the water in a glass.
Another use is in construction. The use of the plumb line shows if the object being built is straight or not. The principle is that the force of the pull acts downwards. Another example is the spirit lever. This can be used by builders to check if the surface is even or not.
In engineering, the properties are important in building bridges and other high-tension structures.
