Some researchers needed to estimate how many catfish were in a local river, so they marked 280 catfish with tags. Later, the researchers trapped 540 catfish, of which 27 had tags. To the nearest whole number, what is the best estimate for the catfish population? (13 points if solved:)
* Please Answer Properly*

Given: ae ≅ ce ; de ≅ be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that △aeb ≅ △ced, we can show that △ ≅ △ceb by. so, ∠cad ≅ ∠ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.