The answer is c to your question
        
             
        
        
        
Answer:
60
Step-by-step explanation:
The perimeter is the measurement around an object.
So first you multiply the 20 and the 10 by 2.
20 * 2 = 40
10 * 2 = 20
Then, add then up!
40 + 20 = 60
 
        
                    
             
        
        
        
Answer:
The length of the largest table that can be brought in the house on a diagonal is 
Step-by-step explanation:
we know that
Applying the Pythagoras Theorem
Find the length of the diagonal of the frame

 
        
                    
             
        
        
        
Answer:
He did not regroup hundredths when adding digits
Step-by-step explanation:
 30.24
+16.26
-----------
 46.50
It can't be the first two, and because .04+.06 are hundredths, it must be the third one.
He did not regroup hundredths when adding digits.
 
        
                    
             
        
        
        
Since it's a rectangle, each angle equals to 90 degrees, since total degrees 360 divided by 4 is 90 degrees.
So, 

Answer : x = 45
Hope this helps. - M