Construction in GCLC language

dim 120 120

point E_{a} 80 83.86
point H_{c} 68.91 84.83

color 220 0 0
fontsize 11

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


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

color 200 200 200
drawcircle k(E_{a},A)
color 0 0 0




% Generating number V[_G13653] with value 0.4442176622684439
number V[_G13653] 0.4442176622684439 


% Calculating value V[_G13674] using formula V[_G13653]*360
expression V[_G13674]  { V[_G13653]*360  } 


% Constructing a point A which is an image of the point V[_G13674] in a rotation around the point E_{a} for the angle H_{c}
rotate A E_{a} V[_G13674] H_{c} 
color 220 0 0
fontsize 11
cmark_t A
color 0 0 0
fontsize 10

color 200 200 200
drawarc_p E_{a} H_{c} V[_G13674] 
color 0 0 0



% Constructing a point H such that AH/AE_{a}=2
towards H A E_{a} 2 
cmark_rt H
color 200 200 200
drawsegment A H 
color 0 0 0


% DET:  points A and H_{c} are not the same
% Constructing a line c which passes through point A and point H_{c}
line c A 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 B such that AB/AH_{c}=0.4442176622684439
towards B A H_{c} 0.4442176622684439 
cmark_b B
color 200 200 200
drawsegment A H_{c} 
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:  line h_{b} and circle k(E_{a},A) intersect% DET:  points H and H_{b} must be different
% Constructing a point P_{\_G14231} which is a foot of the point E_{a} on the line h_{b}
foot P_{\_G14231} E_{a} h_{b} 
cmark_r P_{\_G14231}
color 200 200 200
drawline E_{a} P_{\_G14231} 
color 0 0 0

% Constructing a point H_{b} which is an image of the point H in the symmetry to point/line P_{\_G14231}
sim H_{b} P_{\_G14231} H 
cmark_rt H_{b}


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

color 200 200 200
drawline b
color 0 0 0



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



drawsegment A B
drawsegment A C
drawsegment B C

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