(40+65+55)×40×2

= 160×40×2

=6400×2

= 12800 (square centimeter);

2. Red area: First calculate the areas of four squares with 40cm sides, then calculate the areas of other sides respectively, and finally add them up. The formula is:

40×40×4+(65-40)×40+40× 10+40×55

=6400+ 1000+400+2200

= 10000 (m2)

The simpler way is to use the red part as a carpet and straighten the carpet to form a rectangle. The length of a rectangle consists of two sections, one is the length of the left and right sides: 65*2= 130cm, and the other is the length of the upper side: 40*3= 120cm. The length of a rectangle is * * *. The formula is:

(40×3+65×2)×40

=250×40

= 10000 (m2)