1. Properties of Parellograms

2. Opposite angles are congruent
Parallelograms
Opposite angles are congruent

3. Consecutive angles are supplementary.
ADD UP TO 180
Consecutive angles are supplementary.

4. Opposite sides are congruent

5. Diagonals bisect each other.
This cuts the diagonals into two equal parts.

6. 23 K L 15 N M

7. 23 K L 15 N M

8. 23 K L 15 N M

9. K L P N M

10. RECTANGLE
FOUR RIGHT ANGLES

11. A quadrilateral is a RECTANGLE if and only if it has four right angles

12. Diagonals are Congruent
RECTANGLE
Diagonals are Congruent

13. PQRS is a rectangle