What is the name of the polygon that has two triangles put together?

i dont know the name of two triangles put together because stupid wiki answers never answer my question. they always give me a whole different thing. dont ever come on wiki answers they give you everything wrong!!!!!!! <<<<<<<<<<<>>>>>>>>>>>

I can always divide a rectangle into 2 triangles. Alas, putting 2 triangles together does not always produce a rectangle. Sometimes it makes a rhombus or kite or some other quadrilateral.