5) The following function can be used to convert temperatures in Celsius to Fahrenheit: F = 1.8C + 32 where C represents a temperature in Celsius and F represents the equivalent temperature in Fahrenheit. Convert 15°C into Fahrenheit.

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.