In a triangle PQR, ∠QPR = 50°, QY and RX are altitude on PR and PQ, respectively. The angle bisector of ∠RQY and ∠QRX intersects at I, then, find the ∠QIR?
1
155°
2
145°
3
135°
4
125°
In a triangle PQR, ∠QPR = 50°, QY and RX are altitude on PR and PQ, respectively. The angle bisector of ∠RQY and ∠QRX intersects at I, then, find the ∠QIR?