Divide a square with a perimeter of 8 decimeters into two identical rectangles, each of which has a rectangular area of______ Square decimeter, perimeter is______ Decimeter

Divide a square with a perimeter of 8 decimeters into two identical rectangles, each of which has a rectangular area of______ Square decimeter, perimeter is______ Decimeter

8 △ 4 = 2 (decimeter), 2 × 2 = 4 (square decimeter), 4 △ 2 = 2 (square decimeter), 8-8 △ 4, = 8-2, = 6 (decimeter); answer: the area of each rectangle is 2 square decimeter, and the perimeter is 6 decimeter

How many ways do you have to divide eight small squares with side length of 3 decimeters into rectangles? Then calculate the perimeter and area of each rectangle separately?

2 kinds
(1) 2 * 4 S = 72 square decimeters C = 36 decimeters
(2) 1 * 8 s = 72 square decimeters C = 54 decimeters

The perimeter of the rectangle is 19.4 meters. The length is 0.8 meters less than twice the width. How many meters are the length and width of the rectangle?

Let the width of a rectangle be x meters, then the length is (2x-0.8) meters. According to the meaning of the title, we can get the equation: (x + 2x-0.8) × 2 = 19.4, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 6x-1.6 = 19.4, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp