S_( Δ ABC)=(1/2)AC*h
h^2=BP^2=(AB)^2-(AC/2)^2=15^2-3^2=(15-3)*(15+3)=216
h=6*sqrt(6)
S_( Δ ABC)=(1/2)AC*h=(1/2)*6*6sqrt(6)=18sqrt(6)
p=(15+15+6)=18
[b]r=sqrt(6)[/b]
OM=[b]r=sqrt(6)[/b]
d^2=KM^2=OK^2+OM^2=2^2+(sqrt(6))^2=10
[b]d=sqrt(10) [/b]- о т в е т