3 Suppose we have a -gon. Some diagonals are coloured black and some other diagonals are coloured red (a side is not a diagonal), so that no two diagonals of the same colour can intersect strictly inside the polygon, although they can share a vertex.
3 Ipalagay na kami ay may isang -gon. Ilan diagonals ay kulay itim at sa ibang mga diagonals ay kulay pula (panig ay hindi isang dayagonal), kaya na walang dalawang diagonals ng parehong kulay maaaring magsalikop mahigpit na sa loob ng polygon, bagaman maaari nilang ibahagi ang isang kaitaasan.