Recognise and describe angles as 'less than', 'equal to', 'about the same as' or 'greater than' a right angle

1. Camera, Angle, Action 1 - identify right angle, yes or no
2. Comet Corners - identify right angles, true or false
3. Take A Corner 2 - identify right angle, direct comparison
4. Right Room 2 - identify right angles, true or false