Answer:
GH = 6 units
Step-by-step explanation:
Calculate GC using Pythagoras' identity in right triangle GCE
GC² = 9² + 12² = 81 + 144 = 225 ( take the square root of both sides )
GC = [tex]\sqrt{225}[/tex] = 15
GH + HC = GC ← HC is the radius of the circle and HC = 9, thus
GH + 9 = 15 ( subtract 9 from both sides )
GH = 6
