Answer:
20 less than a number is equal to the number.
Step-by-step explanation:
 
        
             
        
        
        
Answer:
This is a vertical angle theorem 
Step-by-step explanation:
Vertical angles are a pair of opposite angles formed by intersecting lines. In the figure, ∠1 and ∠3 are vertical angles. ... Vertical angles are always congruent . So, in this figure, ∠1≅∠3 and ∠2≅∠4 .
 
        
             
        
        
        
Just a regular pentagon has 5 sides. and also has 5 lines of symmetry.
So if a shape has 7 sides it will have 7 lines of symmetry.
Its always going to be the same number.
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Answer:
C
Step-by-step explanation: