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# record 1: header: parent, keywords
# record 2: calling parameters
# record 3: submit buttons
# record 4: html form content
:geometry, analytic geometry
triangle, area, altitude, angle, radius, incircle, circumcircle,
vertices
:precision, 20
operation, triangle with given vertices
size, 650x350
:, Calculate
:<TD ALIGN=CENTER>
$submit1
plane triangle with given vertices:
<INPUT TYPE=TEXT SIZE=50 NAME="formula" VALUE="(1,2), (0,0), (-3,1)">