TRUE OR FALSE 1. Every quadrilateral is a parallelogram. 2. Every parallelogram is a quad rilateral. 3. Every rhombus is a rectangle. 4. All trapezoid are isosceles. 5. Every rhombus is equiangular. 6. Diagonals of parallelogram are congruent. 7 the opposite angles of square and rectangle are supplementary 8. all sides and angles of a rhombus are congruent 9 a rectangle is a square 10. a quadrilateral is a parallelogram if the diagonals bisect each other