What formula should be used to find the circumference of a circle

Mathematics

2 answers:

Lorico [155]3 years ago

8 0

Answer:

Formula: C = 2πr

For example: The circumference of a circle with a radius of 10 is 62.83

Inessa05 [86]3 years ago

3 0

The circumference = π x the diameter of the circle (Pi multiplied by the diameter of the circle). Simply divide the circumference by π and you will have the length of the diameter. The diameter is just the radius times two, so divide the diameter by two and you will have the radius of the circle

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Three less than triple a number is the same as the number plus 57. What is the number?

Annette [7]

First thing you want to do, is reverse the question.

57/3 - 3.

57/3 = 19.

19 - 3.

Your answer is 16.

7 0

3 years ago

Select all that apply.

Mila [183]

First we need to have same units before comparing them. That is, either both of them are in cm or both of them are in mm. So if we need to convert 12.5 cm to mm, we know that 1 cm =10 mm. So we have to find out how many mm are in 12.5 cm. And let 12.5 cm =x mm. So to find the value of x , we set a proportion and solve for x. That is

$\frac{1cm}{10mm}=\frac{12.5cm}{x mm}$