1. Section 6.4 Special Parallelograms Objective: Students will be able to use properties of diagonals of rhombuses and rectangles and to determine whether a parallelogram is a rhombus or a rectangle.
Warm up
Theorem 6-9 and Proof
Theorem 6-10
Finding Angle Measures
Theorem 6-11
Finding Diagonal Length
Theorems 6-12, 6-13, 6-14
Homework

2. Theorem 6-9
Each Diagonal of a rhombus bisects two angles of the rhombus.

3. Theorem 6-10
The diagonals of a rhombus are perpenicular.

4. Theorem 6-11
The diagonals of a rectangle are congruent.

5. Theorem 6-12
If one diagonal of a parallelogram bisects two angles of the parallelogram, then the parallelogram is a rhombus.
Theorem 6-13
If the diagonals of a parallelogram are perpendicular, then the parallelogram is a rhombus.
Theorem6-14
If the diagonals of a parallelogram are congruent, then the parallelogram is a rectangle.

6. 6.4 Homework
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