In the diagram above, O is the centre of the circle. If | OA = 25 cm and |AB = 40 cm, find |OH|
Line OH divides Line AB into two halves, therefore, Line AH = Line HB = 20cm
Considering △ AOH
(OH)2 = 252 - 202 = 625 - 400 = 225
Taking the square root of both sides
(OH = √225 = 15 cm
