Construction in GCLC language

dim 120 120

point E_{b} 50 56.36
point H_{c} 68.91 84.83

color 220 0 0
fontsize 11

cmark_r E_{b}
cmark_lt H_{c}
color 0 0 0
fontsize 10


% point B is given by the problem setting, but it has to belong to the circle k(E_{b},B) which is constructible from the others objects given 
% NDG:  points H_{c} and E_{b} are not the same
% Constructing a circle k(E_{b},B) whose center is at point E_{b} and which passes through point H_{c}
circle k(E_{b},B) E_{b} H_{c} 

color 200 200 200
drawcircle k(E_{b},B)
color 0 0 0




% Generating number V[_G30665] with value 0.6603201715722826
number V[_G30665] 0.6603201715722826 


% Calculating value V[_G30686] using formula V[_G30665]*360
expression V[_G30686]  { V[_G30665]*360  } 


% Constructing a point B which is an image of the point V[_G30686] in a rotation around the point E_{b} for the angle H_{c}
rotate B E_{b} V[_G30686] H_{c} 
color 220 0 0
fontsize 11
cmark_b B
color 0 0 0
fontsize 10

color 200 200 200
drawarc_p E_{b} H_{c} V[_G30686] 
color 0 0 0



% Constructing a point H such that BH/BE_{b}=2
towards H B E_{b} 2 
cmark_rt H
color 200 200 200
drawsegment B H 
color 0 0 0


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

color 200 200 200
drawline c
color 0 0 0



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

color 200 200 200
drawline h_{c}
color 0 0 0




% Constructing a point A such that BA/BH_{c}=0.6603201715722826
towards A B H_{c} 0.6603201715722826 
cmark_t A
color 200 200 200
drawsegment B H_{c} 
color 0 0 0


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

color 200 200 200
drawline h_{a}
color 0 0 0



% NDG:  line h_{a} and circle k(E_{b},B) intersect% DET:  points H and H_{a} must be different
% Constructing a point P_{\_G31243} which is a foot of the point E_{b} on the line h_{a}
foot P_{\_G31243} E_{b} h_{a} 
cmark_r P_{\_G31243}
color 200 200 200
drawline E_{b} P_{\_G31243} 
color 0 0 0

% Constructing a point H_{a} which is an image of the point H in the symmetry to point/line P_{\_G31243}
sim H_{a} P_{\_G31243} H 
cmark_b H_{a}


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

color 200 200 200
drawline a
color 0 0 0



% NDG:  lines h_{c} and a are not parallel% DET:  lines h_{c} and a are not the same
% Constructing a point C which belongs to line h_{c} and line a
intersec C h_{c} a 
cmark_b C



drawsegment A B
drawsegment A C
drawsegment B C

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