Answer:yes he is correct
Step-by-step explanation:
i have a rectangle you have two UN even sidesand then you have two EVEN sides .
to get area you lenth times with times highth.
you do this : times lenth
step two: times that by whith
step three: add them to gether
science you want to in creasw by 3 x then times it all by three then you have your answer.