Answer:
what does it mean? can you translate it
 
        
                    
             
        
        
        
Answer:
10
Step-by-step explanation:
 
        
             
        
        
        
The triangles are isosceles. The following notation are for the angles. For example ABD is refer to the angle located in the B vertex, formed by the segments AB and BD.


Then

 
        
             
        
        
        
Answer:
False 
Step-by-step explanation:
Trying it in a calculator says otherwise meaning it's false