I’m pretty sure it’s true so A
        
             
        
        
        
Portrait is the right answer
        
                    
             
        
        
        
Answer:
It looks like it could have been done with different  types of mediums. You can tell that the artist tried to make it have more dimension by adding in shadows and highlights. I think the color gives it a good balance though. It looks like it is a piece that as the observer you need to come up with yourself. 
Explanation:idk rly 
 
        
             
        
        
        
Not sure who helped make painting on canvas a common practice but around the end of the 15th century, canvas<span> became more popular as it was cheaper, easier to transport, allowed larger works, and did not require complicated preliminary layers of </span>gesso.
        
                    
             
        
        
        
Answer:
The longest side length is called the hypotenous of the right triangle. To find out a right triangle, u need to square each smaller sides & then square root their summation. Then, if it is same with the larger side,( which is supposed to be the hypotenous) it is a right angle.
Explanation: