Question

bisector of angle p in triangle PQR intersect RQ in S.If QS:RS=4:5, PQ=4 then PR=?

Answer 1

I guess the question is incomplete. Please recheck the question and then-

prove triangle pqs and triangle prs similar by aa test or sas test.

then by csst- qs/rs = pq/pr.

4/5 =4/pr

thus, pr = 5.