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Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

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.

Identify this conic section. x2 - y2 = 16 o line circle ellipse parabola hyperbola