**Two line segments are congruent **when they are **equal in length**.

For Example;

In the above image, both the line segment are congruent since they have equal length.

AB = 4 cm

CD = 4 cm

For congruency, **the lines can be at different angles with each other**.

Hence, there is no rule for any angle formation between the congruent lines.

## Symbol for congruent lines

In geometry congruency between lines is shown by symbol \mathtt{\cong } .

Hence, if lines AB & CD are congruent to each other, we can write;

AB \mathtt{\cong } CD

Try to practice these symbols as they are directly asked in geometry exams.

**Conclusion**

When line segments are said to be congruent it means that they are equal in length.