Points To Remember : Properties of Quadrilateral

PARALLELOGRAM
                        - 2 sets of parallel sides
                      - 2 sets of congruent sides
                      - opposite angles congruent
                      - consecutive angles supplementary
                      - diagonals bisect each other
                      - diagonals form 2 congruent triangles

RECTANGLE
-properties of the parallelogram PLUS
                      - 4 right angles
                      - diagonals congruent

RHOMBUS
            - properties of the parallelogram PLUS
- 4 congruent sides
                      - diagonals bisect angles
                      - diagonals perpendicular

SQUARE
                        -All properties of IIgm ,rectangle and square
- 2 sets of parallel sides
                      - 2 sets of congruent sides
                      - opposite angles congruent
                      - consecutive angles supplementary
                      - diagonals bisect each other
                      - diagonals form 2 congruent triangles
- 4 right angles
                      - diagonals congruent
- 4 congruent sides
                      - diagonals bisect angles
                      - diagonals perpendicular