Lets imagine the shape M /\ / | \ / | \ / | \ P /___ |___\ N O Now in If we take â†MOP and â†MON As MO ⊥ NP so â MON=â MOP NO=NP (given) And MO is a common side so by side angle side rule of congruency â†MOP and â†MON are congruent so MP is congruent to MN