[b]Check boxes for the following:[/b][br]1. Hint 1: Highlight the special pair of line segments.[br]2. Hint 2: Highlight the special angle.[br][br][b]Blue dots for :[/b][br]1. Moving the point P.[br][br][b]Question[/b][br]The diagram shows a circle of radius 5 cm. It has a chord PQ of length 8 cm.[br]Calculate the length of OM. [br](Use the check boxes for hints.)