which figure in question 2 will have an area of 81 square units?什么意思?

which figure in question 2 will have an area of 81 square units?什么意思?

题目
which figure in question 2 will have an area of 81 square units?什么意思?
which figure in question 2 will have an area of 81 square units? what is its perimeter? 这是完整的题。
答案
问题2 中哪一个图形的面积是81个平方单位?
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