which figure in question 2 will have an area of 81 square units?什么意思?
问题描述：
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
问题2 中哪一个图形的面积是81个平方单位?