ONLY RIGHT ANSWERS Three restaurants in town sell hamburgers. Restaurant A increases the price of its hamburger to $2; Restaurants B and C follow the example and increase the price of their hamburgers to $2 as well. This an example of:

a. perfect competition.

B. a monopoly.

C. monopolistic competition.

D. an oligopoly.

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.