2. A wire can be surrounded by a rectangle with a length of12m and a width of 8m. If surrounded by a square, what is the area of the square?

Xiaomi's bedroom needs to be tiled. There are two options:

( 1)、 (2)、

1 decimeter

3 decimetres

2 decimeter

3 decimetres

(1). If the plan 1 requires 100 tiles, how big is the bedroom area?

(2) If Scheme 2 is used, how many pieces are needed? Which is cheaper?

4. Make two rectangles with a length of 8 cm and a width of 4 cm into a square. What is the area of this square?