Do all adjacent angles add up to 180
- Adjacent angles add up to 180
- Do adjacent angles add up to 180
- Do adjacent angles add up to 180 in a quadrilateral
- Do adjacent angles add up to 180 in a parallelogram
- Do adjacent angles add up to 180 degrees
- Do adjacent angles add up to 180 in trapezium
- Do adjacent angles always add up to 180
- Do adjacent angles have to add up to 180
- Adjacent angles add up to 180 degrees
- Angle sum of polygons