What are the values of a, and r of the geometric series?
2-2+2-2+2
a1= 2 and r= -2
a1= -2 and r = 2
a1= -1 and r = 2
a1= 2 and r=-1

In the triangles, bc =de and ac fe. if the mzc is greater than the mze, then ab isdfelth

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.

Graph the system of equations. {6x−4y=−244x−8y=−32 use the line tool to graph the lines.