tanB=AC/BC=3√3/9=√3/3

∠B=30

∠ China =∠QRC=∠B=30.

2

QR is perpendicular bisector of CP.

Q is the midpoint of communication.

x=AC/2=3√3/2

three

∠BRE= 180 -30 -30 = 120

∠REB = 180- 120-30 = 30 =∠B

y=2BRcos30

BR=9-CR

CR=CQtan30

CQ=3√3-x

y=2√3/2(9-(3√3-x)√3/3)

y=9√3/2+x

Domain (0,3 √ 3/2)