; POINT A0 B0 C0 P0; LINE X A0 C0; LINE X B0 C0; LINE X A0 B0; DLINE X P0 A0; DLINE X P0 C0; DLINE X P0 B0; POINT A0 B0 C0 P0; LINE X A0 C0; LINE X B0 C0; LINE X A0 B0; DLINE X P0 A0; DLINE X P0 C0; DLINE X P0 B0; 