qcircle c1 0 0 10
qcircle c2 30 0 20
point p1 7 30
circ2d3Tan tan1 c1 c2 p1

checklength tan1_1 -l 951.90257403770727
checklength tan1_2 -l 66.177052461460107
checklength tan1_3 -l 190.20396243259333
