1. 
The perimeter of rhombus RSTU is 72 and the diagonal RT = 16. What is the area of the rhombus? 

2. 
You want to prove that the perpendicular bisector of the base of an isosceles triangle is also the angle bisector of the vertex. Which postulate can NOT be used in your proof? 

3. 
Given: _{} bisects angles BAD and BCD. Prove: _{}B_{}_{}D


4. 
Given: Diameter _{}, _{}_{}_{}, _{}_{}_{} Prove: _{}B_{}_{}AOD


5. 
Given: _{}ABCD, _{}_{}_{}, _{}_{}_{} Prove: _{}_{}_{}


6. 
Given: _{}1_{}_{}2, _{}_{}, _{}_{} Prove: _{}_{}

