Rhombus HW

7. Which reason could be used to prove that a parallelogram is a rhombus?1) Diagonals are congruent.2) Opposite sides are parallel.3) Diagonals are perpendicular.4) Opposite angles are congruent.8. Quadrilateral JOHN has vertices J 1,1 , O 4,0 , H 5,5 , and N 0,4 .Prove that JOHN is a rhombus.9. The vertices of quadrilateral ZACH are Z (2,3), A (2,7), C (8,5 ), and H (4,1 ) .Use coordinate geometry to prove that ZACH is a parallelogram but not a rhombus.