dim 120 120
point B 20 40
point C 110 40
point M_{c} 50 67.5
color 220 0 0
fontsize 11
cmark_b B
cmark_b C
cmark_lt M_{c}
color 0 0 0
fontsize 10
% Constructing a point A such that BA/BM_{c}=2
towards A B M_{c} 2
cmark_t A
color 200 200 200
drawsegment B A
color 0 0 0
drawsegment A B
drawsegment A C
drawsegment B C
% Non-degenerate conditions:
% Determination conditions: