The coordinate point E(8,-10) after a dilation with scale factor of 2.5, centered at the origin, becomes the point O (20,-25)
O (16, -20)
O (10.5, -7.5)
O (5.5, -12,5​

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.