morleylem 199 Bytes
switch_axes(0);
A:=point(3*i);
B:=point(-2);
C:=point(1-i);
triangle(A,B,C);
J:=inter(bissectrice(A,B,C),bissectrice(B,C,A))[0];
//J:=centre(inscrit(A,B,C));
segment(A,J);
segment(B,J);
segment(C,J);