Colinear Definition
# Are the inputed Points all on the same line?
Colinear:=proc() local i:
if nargs<2 then ERROR(`Need at least two Pts`): fi:
for i from 3 to nargs do
true:
end:
if
AREA
(args[1],args[2],args[i])<>0 then RETURN(false): fi:
od: