1. Rhombi & Squares Section 8-5

2. rhombus – a quadrilateral with 4 congruent sides Since a rhombus is a parallelogram, it has all the properties of a parallelogram.

3. Thms. 8-15, 8-16, & 8-17 The diagonals of a rhombus are perpendicular. If the diagonals of a parallelogram are perpendicular, then the parallelogram is a rhombus. Each diagonal of a rhombus bisects a pair of opposite angles.

4. rhombus

5. Using a picture proof, a. prove the diagonals are perpendicular b.Each diagonal bisects a pair of opposite angles.

6. square – a quadrilateral with 4 right angles and 4 congruent sides A square is a special type of parallelogram that is also a rectangle and rhombus. It has all the characteristics of a parallelogram, a rectangle, and a rhombus.

7. square

8. parallelograms rectangles rhombi squares

9. Joke Time What is 7Q + 3Q? You’re welcome!