<em>90</em> and all of its multiples are.
Https://mathbitsnotebook.com/Algebra1/RealNumbers/RNProp.html
Answer:
22 cm
Step-by-step explanation:
Simply count the number of square units of each side, then add them up. (each square unit = 1 cm)
4+4+2+3+2+7
= 22 cm