2of the dozen eggs in a cartoon are cracked about what percent of the carton is not cracked

Twelve less than a number is at most 20

1/2+1/6-3/4 simplify the given expression leaving the answer in improper fraction form.

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.