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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.
   
5.   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.            
			 parallelograms
rectangles			   rhombi
				squares 
8. Joke Time   What is 7Q + 3Q?
Youre welcome! 
9.   Why was six afraid of seven?
Because 7 8 9.  (seven ate nine) 
10.   Who invented fractions?
Henry the 1/8 th