In which figure is point G an orthocenter?

tocharian and anatolian were belaved to become extinct during the ninth century. =)

i beleive d is the right answer

if he does not use open the compass the a width greater than half of po, he will not be able to find the midpoint of the line, without the midpoint of the line, he will not be able to bisect the line.   to find the midpoint of a line the circles drawn with a compass must either intersect or be touching.