Answer:
D is 90 E is 81 F is 99 
Step-by-step explanation:
D is 90 because a straight angle equals 180 degrees. E is 81 because it is directly across from 81. F is 99 because 180-81 is 99
 
        
             
        
        
        
Answer:
A AND D
B AND C
Step-by-step explanation:
If you change A into lowest terms it equals D
and if you cjange B into lowest terms it would equals C
 
        
             
        
        
        
Answer:
the answer is -1 
Step-by-step explanation:
 
        
                    
             
        
        
        
Hi!
A rectangle can sometimes be a rhombus if it has sides of all equal lengths. If a rectangle was a rhombus, it would also be a square. Furthermore, a square is always a rhombus.
Hope this helps! :)