/* -*-ePiX-*- */
#include "epix.h"
using namespace ePiX;

P O(0,0);
double th(20);

int main()
{
  picture(P(-0.5,0), P(2.5,1), "4.5 x 1.5in");

  begin();
  degrees();
  bold();

  P pA(0,Cos(th)), pB1(-Sin(th), 0), pB2(Sin(th), 0), pC(xmax(),0);

  line(pA, pB1);
  line(pA, pB2);
  line(pA, pC);
  line(pB1, pC);

  arc(pA, 1, -90 - th - 10, -90 + th + 10);

  label(pA, P(0,2), "$A$", t);
  label(pB1, P(-2,-3), "$B_1$", b);
  label(pB2, P(2,-3), "$B_2$", b);

  label(pC, P(0,-2), "$C$", b);

  tikz_format();
  end();
}