[b]Displayed values for the following:[/b][br]1. Angle GAF and angle HCF.[br][br][b]Check boxes for the following:[/b][br]1. Hint for (a): Properties of Triangle.[br]2. Hint for (b): Tangents to the circle from an external point.[br][br][b]Blue dots for :[/b][br]1. Forming of different triangles.[br][br][b]Question:[/b][br]The diagram shows a circle which passes through F, G and H.[br]AGB, BHC and CFA are tangents to the circle. Given that the angles of [br]GAF and HCF are displayed, find [br][br](a) angle ABC,[br](b) angle AGF, and[br](c) angle GFH.