How can I find the circumference of a circle?

👨🏻‍🏫 學術台 數學
2008-10-27 11:27 am
Please tell me how then please solve the equation:
diameter of 10 cm = N

How to solve this?
更新1:

how about this, can you solve this for me??? radius of 5 cm =N radius of 2 cm = N I will give you one week to answer mah question.

回答 (10)

2008-10-27 11:54 am
✔ 最佳答案
c = 2πr
(circumference = 2 * pi * radius)

2πr
= 2 * 3.14 * (10/2)
= 6.28 * 5
= 31.4 cm
👍 0 👎 0
2008-10-27 6:55 pm
Circumference = 2 π r where r is radius
or Circumference = π d where d is diameter (= 2r)
C = π d = 3.14 × 10 = 31.4 cm

And also note area of circle = πr²
-----------
👍 0 👎 0
2008-10-27 6:35 pm
The formula to get the circumference of a circle is:

Circumference = pi multiplied by diameter

pi= 3.14 (rounded off)

Therefore,

Circumference = 3.14 x 10 cm
Circumference = 31.4 cm

The answer is 31.4 cm.

;)
參考: JUST ME!
👍 0 👎 0
2008-10-27 6:32 pm
Circumference = pi * diameter = 3.14 * 10 cm = 31.4 cm
Ans: 31.4 cm
👍 0 👎 0
2008-10-27 6:30 pm
pi times the diameter

the diameter is the width of the circle
or if u know the radius then its radiusx2 times pi
👍 0 👎 0
2008-10-27 6:30 pm
c=2•Ï€•r

c=2•3.14•5
👍 0 👎 0
2008-10-27 6:30 pm
circumfrence of a circle = (2)(pie)(Radius)
👍 0 👎 0
2008-10-27 6:31 pm
πr^2
(pie r squared)
where r is the radius
👍 0 👎 1
2008-10-27 6:30 pm
ok first you times the diameter by 3.14
10 x 3.14 = 31.4 ( 3.14 is usually called pie)
👍 0 👎 1
2008-10-27 6:29 pm
Pie Are Square
👍 0 👎 2


收錄日期: 2021-05-01 11:25:53
原文連結 [永久失效]:
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