ABC is a triangle angled at C as shown in the figure above. Which one of the following is correct?
(a) AQ2 + AB2 = BP2 + PQ2
(b) AQ2 + PQ2 = AB2 + BP2
(c) AQ2 + BP2 = AB2 + PQ2
(d) AQ2 + AP2 = BK2 + KQ2
Answer: (a) AQ2 + AB2 = BP2 + PQ2