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

Step-by-step answer

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

Neil places £2000 in a bank account that pays 1.5% simple interest per year. How much interest will he earn in 6 years?

Step-by-step answer

P Answered by PhD

SI=(P*R*T)/100

P=2000

R=1.5

T=6

SI=(2000*1.5*6)/100

=(2000*9)/100

=180

Neil will earn interest of 180

Mathematics

The last time Robert filled up his car with gas, he paid $24.50 for 7 gallons. This time, he needs 15 gallons. If the price is the same, how much will he pay?

Step-by-step answer

P Answered by PhD

Cost of 7 gallons=$24.50

Cost of 1 gallon=24.50/7=3.5

Cost of 15 gallons=15*3.5=52.5

Cost of 15 gallons will be $52.5

Mathematics

An online media service offers video and music downloads. Each download of a song costs $1. Each download of a video costs 5 times as much as the song download. You have a credit of $70. How many songs can you purchase after buying 12 videos?

Step-by-step answer

P Answered by PhD

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