1. Rectangles Section 8-4

2. rectangle – a quadrilateral with 4 right angles Since a rectangle is a special type of parallelogram, it has all the properties of a parallelogram.

3. Theorems 8-13 and 8-14 If a parallelogram is a rectangle, then its diagonals are congruent. If the diagonals of a parallelogram are congruent, then the parallelogram is a rectangle.

4. Properties of a Rectangle Opposite sides are congruent and parallel. Opposite angles are congruent. Consecutive angles are supplementary. Diagonals are congruent and bisect each other. All 4 angles are right angles.

5. Joke Time How do you prove a cat has 9 tails? 1. No cat has 8 tails. 2. A cat has 1 tail more than no cat. 3. Therefore, a cat has 9 tails.

6. What do you call a tall coffee pot while it’s making coffee? A hypotenuse (high pot in use)