+128 In the diagram below we have QR is parallel to ST, PQ=8, QS=6, and PT=10.5
Find PR
https://latex.artofproblemsolving.com/7/0/2/70221f74557d9f47f65c187cf798e80474ed0974.png
+1252 Please don't post AoPS questions (or at least spam them).
Use the Message Board, or ask a friend! Only if you really need the answer, ask for hints.
PQR and PST are similar. PQ + QS = 14, and PQ = 8, so PQ is 8/14, or 4/7, the length of PS.
Same proportion for PT. PT is 10.5, and PR is 4/7 of that length. Can you find out from here?
+2863 Yes you must be taking an AoPS class! How lucky of you Saketh :D
Just try the problems they give you first, and try your best. And maybe post your attempted solution with the question.
*You will get smarter (trust me)*
