Mathematics : asked on kylahwells

26.01.2023

Can someone tell me how to find the circumference of a circle? Please make it make sense.

1

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09.07.2023, solved by verified expert

Mathematics, DAV Post Graduate College

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Mathematics

Can someone tell me how to find the circumference of a circle? Please make it make sense.

Step-by-step answer

P Answered by Specialist

$\huge\color{pink}{{★ƛƝƧƜЄƦ ↦}}$

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$\large{ \sf{yah \: u \: can \: find \: circumference}} \\ \large{ \sf{\: of \: a \: circle \:by \: using \: formula .}} \\ \\ \large \pink{\boxed{ \sf{c = 2\pi \times r}}} \\ \\$

$\large \green{ \sf{c = circumference}} \\ \\ \large \green{ \sf{\pi = 3.14 \: or \: \frac{22}{7}}} \: \: \: \: \: \: \\ \\ \large \green{ \sf{r = radius}} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

$\large \sf{⇨Circumference \: of \: the \: circle \: } \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ \large \sf{is \: also \: known \: as \: perimeter \: of \: circle}$

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$\sf{❥\: ℓσνєнαςкєя...}$

Mathematics

Area of a circle is 80 cm². Work out the circumference of the circle. Can someone please help. And tell me how you did it please.

Step-by-step answer

P Answered by PhD

The circumference of circle is: 31.714 cm

Step-by-step explanation:

Let C be the circumference of the circle

And A be the area of circle

It is given that:

A = 80cm^2

We have to find the radius first so that it can be used to find the circumference

The area of circle is given by the formula:

$A = \pi r^2$

Putting the value of area

$80 = 3.14 * r^2\\\frac{80}{3.14} = r^2\\r^2 = 25.477$

Taking square root on both sides

$\sqrt{r^2} = \sqrt{25.477..}\\r = 5.0475\ cm$

Now

$C = 2\pi r$

Putting the value of radius

$C = 2 * 3.14 * 5.05\\C = 31.714\ cm$

Hence,

The circumference of circle is: 31.714 cm

Mathematics

Area of a circle is 80 cm². Work out the circumference of the circle. Can someone please help. And tell me how you did it please.

Step-by-step answer

P Answered by PhD

The circumference of circle is: 31.714 cm

Step-by-step explanation:

Let C be the circumference of the circle

And A be the area of circle

It is given that:

A = 80cm^2

We have to find the radius first so that it can be used to find the circumference

The area of circle is given by the formula:

$A = \pi r^2$

Putting the value of area

$80 = 3.14 * r^2\\\frac{80}{3.14} = r^2\\r^2 = 25.477$

Taking square root on both sides

$\sqrt{r^2} = \sqrt{25.477..}\\r = 5.0475\ cm$

Now

$C = 2\pi r$

Putting the value of radius

$C = 2 * 3.14 * 5.05\\C = 31.714\ cm$

Hence,

The circumference of circle is: 31.714 cm

Mathematics

Can someone tell me how to find the Radius, Diameter, And Circumference Of a Circle?

Step-by-step answer

P Answered by Specialist

1

Radius:

radius is always half the length of its diameter. For example, if the diameter is 4 cm, the radius equals 4 cm ÷ 2 = 2 cm.

Diameter:

2 times the radius is the circle's diameter.

Circumference:

The formula is simply this: C = πd. In this equation, "C" represents the circumference of the circle, and "d" represents its diameter. That is to say, you can find the circumference of a circle just by multiplying the diameter by pi.the formula for circumference of a circle is 2 x pi x r(radius).

Mathematics

Can someone tell me how to find the Radius, Diameter, And Circumference Of a Circle?

Step-by-step answer

P Answered by Master

1

Radius:

radius is always half the length of its diameter. For example, if the diameter is 4 cm, the radius equals 4 cm ÷ 2 = 2 cm.

Diameter:

2 times the radius is the circle's diameter.

Circumference:

The formula is simply this: C = πd. In this equation, "C" represents the circumference of the circle, and "d" represents its diameter. That is to say, you can find the circumference of a circle just by multiplying the diameter by pi.the formula for circumference of a circle is 2 x pi x r(radius).

Mathematics

Find the area and circumference of each circle. listed in the item bank are some important labels for sections of the image below. to find out more information about labels, some have more details available when you click on them. drag and drop each label to the corresponding area it identifies in the image. i don t understand this question can someone tell me the answer? i attached the picture. i will be giving 50 points for this question. you!

Step-by-step answer

P Answered by PhD

17

Area = πr^2

Circumference = 2πr

Blue:

Area = 5^2 = 25π

Circumference = 2 * 5 * π = 10π

Pink:

Area = 6^2 = 36π

Circumference = 2 *6*π = 12π

White:

r = 3

Area = 3^2 = 9π

Circumference = 2 *3 = 6π

Red:

Area = 7^2 = 49π

Circumference = 2 *7 = 14π

Mathematics

Find the area and circumference of each circle. listed in the item bank are some important labels for sections of the image below. to find out more information about labels, some have more details available when you click on them. drag and drop each label to the corresponding area it identifies in the image. i don t understand this question can someone tell me the answer? i attached the picture. i will be giving 50 points for this question. you!

Step-by-step answer

P Answered by PhD

17

Area = πr^2

Circumference = 2πr

Blue:

Area = 5^2 = 25π

Circumference = 2 * 5 * π = 10π

Pink:

Area = 6^2 = 36π

Circumference = 2 *6*π = 12π

White:

r = 3

Area = 3^2 = 9π

Circumference = 2 *3 = 6π

Red:

Area = 7^2 = 49π

Circumference = 2 *7 = 14π

Mathematics

You can buy jars of the same jam in 2 sizes large jar:440g for £1.54 small jar:340g for £1.26 By considering the price per gram, work out which jar is the best value for money. Working must be shown

Step-by-step answer

P Answered by PhD

Answer: 440 grams for 1.54 is the better value
Explanation:
Take the price and divide by the number of grams
1.54 / 440 =0.0035 per gram
1.26 / 340 =0.003705882 per gram
0.0035 per gram < 0.003705882 per gram

Mathematics

An ice cream shop offers 5 different flavors of ice cream and 9 different toppings. How many choices are possible for a single serving of ice cream with one topping?

Step-by-step answer

P Answered by PhD

For 1 flavor there are 9 topping

Therefore, for 5 different flavors there will be 5*9 choices

No of choices= 5*9

=45

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