It's called a rectangle. This is just a definition, so there is not much to explain.
Answer:
The correct answer would be J;
;
Step-by-step explanation:
Using the algebra;
= 

Altogether this would give "J" as the answer.
Hope this helps!
It would be 12 ones it would be this because you have to add 7+ 5
S=zh−4zt3 ghfhh by tfde RV h