Point O is the centre of the circle. Point A is any arbitrary point.[br][br]Select [i][b]Angle A[/b][/i]:[b] [color=#ff0000]Move point A so that angle A it is exactly half of angle O.[/color][/b][br]Find two other places where this happens. What do you notice?[br][br]Select [i][b]Angle B[/b][/i]: [b][color=#ff0000]Move point M (or N). How does angle B compare to angle O?[/color][/b]