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title: Supplementary Angles
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## Supplementary Angles
Two angles which sum up to 180° are called supplementary angles.
![Image showing two angles, one with 120 degrees and the other with 60 degrees](https://raw.githubusercontent.com/pranabendra/articles/master/Supplementary-angles/images/sup1.png)
Supplementary angles don't have to be next to each other, just so long as the total is 180°. Here's an example:
![Parallel lines a and b with line t through them, creating 8 angles](https://raw.githubusercontent.com/pranabendra/articles/master/Supplementary-angles/images/sup2.png)
As `a` is parallel to `b`, angles "`3`" and "`6`" sum up to 180°. Hence, they are supplementary angles.
### More Information:
- Supplementary Angles article: Varsity Tutors