I wish I can help you but I don’t know sorry I’m in a higher grade
        
             
        
        
        
Euclid of Alexandria is known as the father of modern geometry.
 
        
             
        
        
        
Answer:
Step-by-step explanation:
b
 
        
             
        
        
        
You see how these 2 angles marked are both inside the 2 parallel lines? 
And they are on opposite side of the transversal, the line crossing the 2 parallel lines?
These 2 angles are alternate interior angles and they are equal, I think you can do the last part by yourself.