# 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

:
 $submit1
 plane triangle with given vertices:
 <input type="text" size="50" name="formula" value="(1,2), (0,0), (-3,1)">
