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Firlakuza [10]
3 years ago
14

How do you figure out circumference?

Mathematics
2 answers:
Elza [17]3 years ago
4 0
If you know the diameter of the circle, multiply the diameter by PI

 if you know the radius of the circle multiply the radius by 2 then multiply by PI

Amanda [17]3 years ago
3 0
The circumference of a circle is as follows

given the Diameter: C= \pi *d
given the radius: C=2* \pi *r
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Circle O has a circumference of 36tt cm. what is length of the radius r
allochka39001 [22]

Answer:

5.73cm

Step-by-step explanation:

Given parameters:

Circumference of the circle = 36cm

Unknown

Length of the radius = ?

Lets represent the radius by r

Solution

The circumference of a circle is the defined as the perimeter of a circle. The formula is given as:

            Circumference of a circle = 2πr

Since the unknown is r, we make it the subject of the formula:

           r = \frac{circumference of the circle}{2π}

          r = \frac{36}{2 x 3.142} = \frac{36}{6.284} = 5.73cm

3 0
3 years ago
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If the ratio of the sides of two squares is 3:1, what is the ratio of their perimeters?
Anvisha [2.4K]

Answer:

Ratio of the perimeters =3:1

Step-by-step explanation:

We have given that : Ratio of the sides of two squares is 3:1

To find : Ratio of their perimeters

Solution : Let the length of the sides are 3:1 = 3x : x

                  Formula of perimeter of square = 4(side)

Using the formula ,

Perimeter of 1 square = 4×3x= 12x

Perimeter of 2 square = 4×x= 4x

Ratio of the perimeter of 1 square and 2 square = 12x : 4x

                                                                                 = 3 : 1


8 0
3 years ago
What would the unit rates be for a man who walked 20 mi in 5 h?
sergey [27]
Four miles every hour
5 0
3 years ago
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The radius of Earth is about 6.38 x 10³ kilometers. Write this distance in standard notation.​
Nina [5.8K]

Answer:

6380

Step-by-step explanation:

You can use your calculator or knowing that 10^3 is 1000 so 6.38 x 1000= 6380.

7 0
3 years ago
Given the equation 3x-4y=8, which equation below would cause an infinite solutions system
bulgar [2K]

Answer:

thers nothig below

Step-by-step explanation:

8 0
2 years ago
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