The sequence of transformations that can be performed on quadrilateral ABCDto show that is congruent to quadrilateral GHIJ is a what followed by a what

Which equation represents the partial sum of the geometric series?

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')

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.