It is known that the circumference of the rectangle is 22 decimeters and the length is 7.6 decimeters. Find the area of the rectangle Need "solution" and "answer" (solution of equation)

It is known that the circumference of the rectangle is 22 decimeters and the length is 7.6 decimeters. Find the area of the rectangle Need "solution" and "answer" (solution of equation)

Let the width be m decimeter
There are
(M+7.6)X2=22
It is concluded that M = 3.4
So the width of the rectangle is 3.4 decimeters
So the rectangular area is 7.6x3.4 = 25.84 square decimeters

The circumference of a rectangle is 22dm, the length is 7dm, and the width is a fraction of the length?

Width = 22 / 2-7 = 4dm
4÷7=4/7
So the width is 4 / 7 of the length

Divide the circle with a radius of 1 decimeter into several parts, cut it and put it together into an approximate rectangle. The circumference of the rectangle is () cm, and the area is ()?

. 3.14×（1×2）+1×2
=6.28+2
=8.28 (decimeter)
8.28 decimeters = 82.8 cm
3.14 × 1 & # 178; = 3.14 (decimeter & # 178;)
A: the perimeter of this rectangle is 82.8 cm and the area is 3.14 decimeters

The perimeter of a rectangle is 32 decimeters. If its length and width are increased by 4 decimeters each, the increased area is______ Square centimeter

As shown in the figure, if the length of the original rectangle is a and the width is B, then a + B = 32 △ 2 = 16 decimeters, the expanded area is a × 4 + B × 4 + 4 × 4 = 4A + 4B + 16 = 4 × (a + b) + 16 = 4 × 16 + 16 = 64 + 16 = 80 (square decimeters) = 8000 (square centimeters), so the answer is: 8000

The width of the rectangle is 5.6 decimeters, 24 centimeters less than the length. What is the circumference of the rectangle?

Length: 5.6 + 2.4 = 8 decimeters
Perimeter: (5.6 + 8) x2 = 27.2 decimeters

What is the area of a rectangle with a circumference of 60 decimeters and a width of 10 centimeters?

60 decimeters = 600 cm
Width is 10 cm, length = (600-10 * 2) / 2 = 580 / 2 = 290
290 * 10 = 2900 square centimeter

A rectangle is made up of three squares. The side length of the square is 8 cm. What is the circumference of the rectangle

Length 8 × 3 = 24 cm
Perimeter (24 + 8) × 2 = 64cm
Brief answer

The perimeter of a square is equal to that of a rectangle which is 10 cm long and 8 cm wide. What is the area of the square?

It's very simple. It's square centimeter
Find the circumference of rectangle: (10 + 8) × 2 = 36 (square centimeter)
Find the side length of the square: 36 △ 4 = 9 (CM)
Square area: 9 × 9 = 81 (square centimeter)

Use two 3DM squares to make a rectangle. What are the perimeter and area of the rectangle

Perimeter: (3 + 3 × 2) × 2 = 18 (decimeter)
Area: 3 × (2 × 3) = 18 (square decimeter)

A rectangle is divided into two squares, and its perimeter is increased by 8 cm. What is the perimeter and area of the rectangle?

If the perimeter is increased by 8cm, there are actually two more lines, that is 8 △ 2 = 4 (CM). This 4cm is the length of a line and the width of a rectangle
If it can be divided into two squares, it is proved that the width is twice the length, and 4 × 2 = 8 (CM) is the length
Find the circumference, naturally (length + width) × 2, (8 + 4) × 2 = 24 (CM)
For area, naturally, it is length × width, 4 × 8 = 32 (CM & # 178;)
A: the perimeter of a rectangle is 24cm, and its area is 32cm