Do all angles add up to 180
- Do all angles add up to 180 in a triangle
- Do all angles add up to 180 degrees
- Do angles add up to 180
- All angles add up to 180 in a triangle
- Do alternate angles add up to 180
- Do interior angles add up to 180
- Do triangle angles add up to 180
- Do parallel angles add up to 180
- Do all interior angles add up to 180
- Do all adjacent angles add up to 180
- Do all supplementary angles add up to 180
- Do all triangle angles add up to 180 degrees
- Do all exterior angles add up to 180
- Do all triangles interior angles add up to 180
- Do all angles have to add up to 180