Construction in GCLC language

dim 120 120

point B 20 40
point M_{b} 95 67.5
point N 72.5 61.93

color 220 0 0
fontsize 11

cmark_b B
cmark_rt M_{b}
cmark_r N
color 0 0 0
fontsize 10


% Constructing a line L_{\_G22508} which passes through point B and point M_{b}
line L_{\_G22508} B M_{b} 

color 200 200 200
drawline L_{\_G22508}
color 0 0 0


% Constructing a point P_{\_G22609} with coordinates (0,0)
point P_{\_G22609} 0 0 
cmark_r P_{\_G22609}

% Constructing a point P_{\_G22533} such that BP_{\_G22533}/BP_{\_G22609}=2
towards P_{\_G22533} B P_{\_G22609} 2 
cmark_r P_{\_G22533}
color 200 200 200
drawsegment B P_{\_G22533} 
color 0 0 0

% Constructing a point P_{\_G22578} such that BP_{\_G22578}/BP_{\_G22609}=3
towards P_{\_G22578} B P_{\_G22609} 3 
cmark_r P_{\_G22578}
color 200 200 200
drawsegment B P_{\_G22578} 
color 0 0 0

% Constructing a line L_{\_G22539} which passes through point M_{b} and point P_{\_G22578}
line L_{\_G22539} M_{b} P_{\_G22578} 

color 200 200 200
drawline L_{\_G22539}
color 0 0 0


% Constructing a line L_{\_G22502} which contains the point P_{\_G22533} and is parallel to the line L_{\_G22539}
parallel L_{\_G22502} P_{\_G22533} L_{\_G22539} 

color 200 200 200
drawline L_{\_G22502}
color 0 0 0


% Constructing a point G which belongs to line L_{\_G22502} and line L_{\_G22508}
intersec G L_{\_G22502} L_{\_G22508} 
cmark_t G



% Constructing a point O such that NO/NG=3
towards O N G 3 
cmark_t O
color 200 200 200
drawsegment N O 
color 0 0 0



% Constructing a point H such that NH/NG=-3
towards H N G -3 
cmark_rt H
color 200 200 200
drawsegment G H 
color 0 0 0



% Constructing a point E_{b} such that BE_{b}/BH=0.5
towards E_{b} B H 0.5 
cmark_r E_{b}
color 200 200 200
drawsegment B H 
color 0 0 0


% DET:  points B and H are not the same
% Constructing a line h_{b} which passes through point B and point H
line h_{b} B H 

color 200 200 200
drawline h_{b}
color 0 0 0



% NDG:  points B and O are not the same
% Constructing a circle k(O,C) whose center is at point O and which passes through point B
circle k(O,C) O B 

color 200 200 200
drawcircle k(O,C)
color 0 0 0



% NDG:  points M_{b} and N are not the same
% Constructing a circle k(N,M_{a}) whose center is at point N and which passes through point M_{b}
circle k(N,M_{a}) N M_{b} 

color 200 200 200
drawcircle k(N,M_{a})
color 0 0 0



% NDG:  line h_{b} and circle k(N,M_{a}) intersect% DET:  points E_{b} and H_{b} must be different
% Constructing a point P_{\_G23644} which is a foot of the point N on the line h_{b}
foot P_{\_G23644} N h_{b} 
cmark_r P_{\_G23644}
color 200 200 200
drawline N P_{\_G23644} 
color 0 0 0

% Constructing a point H_{b} which is an image of the point E_{b} in the symmetry to point/line P_{\_G23644}
sim H_{b} P_{\_G23644} E_{b} 
cmark_rt H_{b}


% DET:  points H_{b} and M_{b} are not the same
% Constructing a line b which passes through point H_{b} and point M_{b}
line b H_{b} M_{b} 

color 200 200 200
drawline b
color 0 0 0



% NDG:  line b and circle k(O,C) intersect
% Constructing points C and A which are in intersection of k(O,C) and b
intersec2 C A k(O,C) b 
cmark_b C
cmark_t A



drawsegment A B
drawsegment A C
drawsegment B C

% Non-degenerate conditions:  line b and circle k(O,C) intersect; line h_{b} and circle k(N,M_{a}) intersect; points M_{b} and N are not the same; points B and O are not the same
% Determination conditions:  points H_{b} and M_{b} are not the same; points E_{b} and H_{b} must be different; points B and H are not the same