A rhombus can be divided into 2 triangles, only by drawing just 1 diagonal. And each of these triangles will be NECESSARILY an isosceles triangle… as adjacent equal sides of rhombus become the equal sides of isocseles triangle.. read more
Since the sides of a rhombus are congruent, all a single diagonal will do is divide the rhombus into two congruent isosceles triangles. In other words, triangle WXY will be congruent to WZY for any rhombus WXYZ. Similar, triangle XYZ and triangle XWZ are also congruent. read more