Question 715003
This is not a question but just at glancing you should make sure u memorize your squares you know like 5*5=25  7*7=49   9*9=81   11*11=121   12*12=144 also know that a rectangle has 4 sides and since this could be a square you should know your multiples of basic numbers like 2 4 6 8 or 5 10 15 20 or 12 24 36 48.     48/4=12  144/12=12