1. 6-3 Rectangles Objectives:
To recognize and apply the conditions that ensure a quadrilateral is a parallelogram.

2. Vocabulary
Rectangle

3. Rectangle A rectangle is a quadrilateral with four right angles.
Since a rectangle has opposite angles congruent, it must then be a parallelogram. It therefore has all the properties of a parallelogram.

4. Theorem 6-9
If a parallelogram is a rectangle, then its diagonals are congruent

5. Here is a summary of the properties of a rectangle.

6. Example 1

7. Homework
6-3 Worksheet