The area of a circle is 24 square meters. How to calculate the circumference of the circle

The area of a circle is 24 square meters. How to calculate the circumference of the circle

Because the area of the garden is π r square
Perimeter = π D
So 24 / π under the root is the radius of the circle
So 24 / π * π is the area of the garden under the double root sign

What is the circumference of a circle? What conditions are needed to calculate the circumference of a circle? How to calculate the circumference of a circle? What is the area of a circle? How to calculate the area of a circle
Do you know how to calculate fractional multiplication
In a hurry

The circumference of a circle is the length of a circle, which can be calculated by radius * 2 * PI, or diameter * PI
The area of the circle is the size of the plane occupied by the circle. The area of the circle = the square of the radius * the circumference
In the calculation method of fractional multiplication, the product of numerator and numerator multiplication is used as numerator, and the product of denominator and denominator multiplication is used as denominator. For example: (1 / 3) * (1 / 2) = (1 * 1) / (3 * 2) = 1 / 6

If there is a circumference of a circle, then how to calculate the area of the circle
I forgot to say that the perimeter is 62.8m

Perimeter △ 3.14 = diameter △ 2 = square of radius × 3.14 = area 62.8 △ 3.14 = 20m 20 △ 2 = square of 10m 10 × 3.14 = 314m2

How to calculate the area of a circle with the circumference of the circle? Do not use the formula. I can't understand it. Otherwise, who can do it? I can calculate it. The circumference is 62 kilometers. Please calculate the area of the circle!

The area is 306 square kilometers

As shown in the figure on the left, the sum of the areas of the two circles is 125.6 square centimeters, and the perimeter ratio of the two circles is 3:1

Area of small circle = 125.6 △ 3 & # 178; + 1 & # 178;) = 12.56 (square centimeter)
Area of great circle = 12.56 × (3 × 3) = 113.04 (square centimeter)

1. There are two circles. The difference of their area is 96 square centimeters. The perimeter of the small circle is 25% of that of the big circle. What is the sum of the two circles?
2. Party A and Party B travel from A. B, which is 120km away. Party A travels 3km per minute and Party B 4km per minute. How many minutes later, they are 50km apart?
3. The height of the cone is three times that of the cylinder, and the radius of the bottom of the cone is one half of the radius of the bottom of the cone, then the volume of the cone is () percent less than that of the cylinder
4. Football tickets are 15 yuan each. After the price reduction, the audience has increased by half and the income has increased by one fifth. How much is the price reduction per ticket?
5. After a cylinder is cut along the diameter of its bottom, its surface area increases by 800 square centimeters. It is known that the diameter of its bottom is equal to its height. What is the circumference of its bottom?
Quick answer, many rewards!

1.17×96/15;
2.10 minutes
3. The title is wrong. If the bottom radius of a cone is half of that of a cylinder, it is 75%;
4. Down 3 yuan
5.40π

If the radius of the big circle is twice that of the small circle, the perimeter of the big circle is several times that of the small circle, and the area of the big circle is several times that of the small circle

Perimeter formula: 2 π R
Because the radius of the big circle is twice the radius of the small circle, the circumference is twice
Area formula: π R & # 178;
Because the radius of the big circle is twice that of the small circle, the area is four times

The diameter of the big circle is four times that of the small circle, and the area of the big circle is four times that of the small circle______ The circumference of the big circle is the circumference of the small circle______ Times

Let the diameter of big circle and small circle be 4A and a respectively, the circumference of big circle is that of small circle: (4a π) / (a π) = 4, and the area of big circle is that of small circle: [π (4a △ 2) 2] / [π (a △ 2) 2] = 4 △ 14, = 16. Answer: the perimeter of big circle is 4 times that of small circle, the area of big circle is 16 times that of small circle, and the perimeter of big circle is 4 times that of small circle

Judgment: the perimeter of the big circle is 5 times that of the small circle, and the area of the small circle is 4% of that of the big circle

Judgment: the perimeter of the big circle is 5 times of that of the small circle, and the area of the small circle is 4% of that of the big circle

The diameter of the big circle is four times that of the small circle. The perimeter of the big circle is several times that of the small circle. What is the area of the small circle

The area of a small circle is one sixteenth of that of a large one