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#1 2017-09-13 06:56:37
- taylorn5683
- Member
- Registered: 2017-02-01
- Posts: 10
Circumferences and Arc Length
What is the circumference of the circle if the radius is:
4. 3x-4
I tried and tired and there are no like terms so it wont work but my teacher says differant.
What is the radius if the circumference is:
6. 30x(pi)
radius is 4.8x
7. 4x-10pi
4x-31.4
8. (5/2)pi
1.24 Pi
9. 14pi
the radius is 2.2
10. (x + y)pi
PI x+PI y
she won't explain what is wrong or how to do it she says just use formula but I am confused with the variable I think.
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#2 2017-09-13 08:10:06
Re: Circumferences and Arc Length
Hi taylorn5683,
Let's start with the formula for the circumference of a circle. If a circle has radius , then its circumference is . So, if a circle has radius , then it has circumference .So if a circle has radius , what must the circumference be?Offline
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