An art gallery has 8 new paintings, all the same size, but enough room on the wall for only 6 of them. how many ways can the director arrange the 8 paintings on the wall? a. 48 b. 28 c. 20,160 d. 40,320

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

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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.