The circumference of a rectangle is 56 cm, and its width is known to be 12 cm. Its area is______ ．

The circumference of a rectangle is 56 cm, and its width is known to be 12 cm. Its area is______ ．

56 △ 2-12 = 16 (CM), 16 × 12 = 192 (square cm); answer: the area of this rectangle is 192 square cm

I know how perimeter counts area

The circumference formula C = 2 π R can be used to calculate the radius of a circle, and then the area formula s = π R 2 is brought in;

How to calculate the circumference and area of a circle?
Remember to be detailed, in ordinary language, don't speak too abstruse, because I'm only in the fifth grade, I want to know this knowledge quickly!
Interested please answer, like the teacher step by step to teach me

The perimeter is 3 times the radius, and the area is 3 times the radius, and then it is multiplied by the radius again. The description of radius is when his face draws a circle and its center, connects the center and the circle with a line segment, and then tells him that this is the radius

Until the perimeter of the bottom, how to calculate the bottom area
The total edge length of a cuboid is 48 cm, and the perimeter of its bottom surface is 18 cm. What is the volume of the cuboid?

Until the circumference of the bottom, how to calculate the bottom area? Explain the white point. What does "until the circumference of the bottom" mean? Do you know the meaning of the circumference of the bottom? And do you mean the area of the circle? If you calculate the area of the circle s, the circumference C, the radius r, and the circumference Π according to the formula of the circumference C = 2 Π R, you can calculate r = C / (2 Π) and then

If the perimeter of a rectangle is 60 cm, and the ratio of length to width is 3:2, the area of the rectangle is 2______ Square centimeter

60 △ 2 = 30 (CM); 3 + 2 = 5; 30 × 35 = 18 (CM); 30 × 25 = 12 (CM); 18 × 12 = 216 (square cm); answer: the area is 216 square cm

The circumference of the rectangle is 200 cm, and the length is three times the width. How many square centimeters is the area of the rectangle?

Width 200 ／ 2 ／ (3 + 1) = 25cm
Length 25 × 3 = 75cm
Area 75 × 25 = 1875 square centimeter

The circumference of a rectangle is 48 cm, and the ratio of length to width is 4:3. What is the area of the rectangle?

48/2=24
24*4/7=96/7
24*3/7=72/7
Area: 96 / 7 * 72 / 7 = 6912 / 49 = 141 square centimeters

A rectangle has a circumference of 20 cm, its ratio of length to width is 3:2, and its area is () square cm

24

The length and width of a rectangle are integer centimeters, and the area of the rectangle is 12 square centimeters. Find the perimeter of the rectangle

12=1×12
=2×6
=3×4
The corresponding perimeter is: (1 + 12) × 2 = 26cm
(2 + 6) × 2 = 16 cm
(3 + 4) × 2 = 14cm
The minimum is 14 cm and the maximum is 26 cm

If there is a rectangle whose length and width are integer centimeters, and its area is 12 square centimeters, what is the circumference of the rectangle
Centimeter?

The length can be 12,4,6, and the width can be 1,3,2. The circumference is 26 or 14 or 16