The answer to your question: the ratio of 4 months that have 30 days is ✨3 to 1✨
        
                    
             
        
        
        
Answer:c 20
Step-by-step explanation:
 
        
             
        
        
        
The answer to your question would be 'A'
        
             
        
        
        
Answer:
sometimes, if their average angle is over 45 degrees
never are 2 obtuse angles summing to 180 degrees
always.  two 90 degree angles always sum to 180 which is a straight line