// -*- C -*-

prisml = 13;
triedge = 13;

module FaceTriangle(){
  x = triedge / 2;
  y = triedge / 2 * sqrt(3);
  polygon([[-x,  0],
	   [ 0,  y],
	   [ x,  0]]);
}

module Body(){
  translate([0, prisml/2, 0])
    rotate([90,0,0])
    linear_extrude(height=prisml) FaceTriangle();
}

Body();