2 Let, and be three circles that does not intersect and non of them is inside another. Suppose, and be internal common tangents of,, . Let be sides of polygon . Prove that are concurrent.
2 Hayaan, at ay tatlong bilog na hindi bagtasin at hindi sa kanila ay sa loob ng isa pa. Ipagpalagay, at ay ang panloob na karaniwang tangents ng,, . Hayaan maging panig ng polygon . Patunayan na ang ay kasabay.