In △PQR, O is the incentre and ∠P = 42º. Then what is the measure of ∠QOR?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 111º
Concept
∠QOR = 90 + ∠P / 2
Application
∠QOR = 90 + ∠P / 2
Putting the value of ∠P = 42º
∠QOR = 90 + 42º / 2
∠QOR = 90 + 21º
∠QOR = 111º