# Why can lines not be congruent?

Let's start with the definition. Definition: Line segments are congruent if they have the same length So lines and rays would be congruent if they had the same length. However, Rays and lines cannot be congruent because they do not have both end points defined, and so have no definite length. It know it's a LONG story, the the bottom LINE is they have no length so they can't be congruent.

### What is the difference from marking 1 or 2 line in a congruent figure to show its congruent?

Marking one line makes no sense. You must have at least two lines that are congruent to one another. Marking one line makes no sense. You must have at least two lines that are congruent to one another. Marking one line makes no sense. You must have at least two lines that are congruent to one another. Marking one line makes no sense. You must have at least two lines that are congruent to one…

### What are some examples of congruent angles?

All right angles are congruent. All straight angles are congruent. All zero angles are congruent. All the angles of a regular polygon are congruent. Vertical angles (the angles opposite one another when two lines intersect) are congruent. When a transversal crosses parallel lines: Corresponding angles are congruent. Alternative Interior angles are congruent. Alternative Exterior angles are congruent. Finally, any angles with the same measure are congruent.

### Uses of parallel lines cut by a transversal?

There's lots of useful things you can discover when parallel lines are cut by a transversal, most of them having to do with angle relationships. Corresponding angles are congruent, alternate interior angles are congruent, same side or consecutive interior angles are supplementary, alternate exterior angles are congruent, and vertical angles are congruent.

### If two lines are parallel are they congruent?

First, lines and rays cannot be congruent because they do not have both end points defined. Not having an end point define means we cannot talk about their length so they can't be congruent. Line segments, however, can be congruent. Congruent line segments NEED NOT be parallel. Furthermore, if two line segments are parallel, that does not mean they are congruent since parallel line segments may not have the same length. Congruent line segments would…