Does a triangles angles add up to 180

- Does a triangles angles always add up to 180
- Does every triangles angles add up to 180
- Triangles angles add up to 180
- All triangles angles add up to 180
- Do triangles angles add up to 180
- How to prove a triangles angles add up to 180
- Do all triangles angles add up to 180
- Do all triangles angles add up to 180 degrees
- Do isosceles triangles angles add up to 180