1. CLASSIFYING QUADRILATERALS OBJ: TO DEFINE AND CLASSIFY SPECIAL TYPES OF QUADRILATERALS

2. QUADRILATERALS A polygon with four sides 360°: Sum of the interior angles of any convex quadrilateral

3. RECTANGLE Opposite sides are congruent All angles are right angles Opposite sides are parallel

4. SQUARE All sides are congruent All angles are right angles Opposite sides are parallel

5. PARALLELOGRAM Opposite sides are congruent Opposite sides are parallel Opposite angles are congruent

6. RHOMBUS All sides are congruent Opposite sides are parallel Opposite angles are congruent

7. TRAPEZOID A quadrilateral with exactlyONE pair of sides PARALLEL

8. RELATIONSHIP AMONG QUADRILATERALS Quadrilateral Trapezoid Rhombus Rectangle Parallelogram