∠B=60,→PF=PB=FB=x,
PF CQ,PF=CQ。
△PFE?△CQE
→CE=EF=y .
x+2y=6
y =(- 1/2)* x+3(0 & lt; = x & lt=6)
(3) When point P is on the extension line of line segment BA, the parallel line passing through point P as AC intersects BC and point G,
Similarly △ PGE △ ECQ → EG = CE = Y,
x-2y=6
y =( 1/2)* x-3(x & gt; 6)
Over! NBUZW