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Mathematics 8 Online
lorena123:

A circle has a diameter of 7.6 feet. Which measurement is closest to the circumference of the circle in feet?

lorena123:

F. 23.9 ft G. 45.3 ft H. 47.7 ft J. 11.9 ft

snowflake0531:

do you know how to solve for circumference of a circle?

lorena123:

They havent taught us that at least i dont remeber them teaching us that

lorena123:

If its multiplication then i can do it i think lol

snowflake0531:

okay, so to find the circumference, you have to do 2 times pi times r do you know the difference between radius and diameter?

lorena123:

I think radius is half of diameter

snowflake0531:

yes, so what would be the radius for this?

lorena123:

3.8?

snowflake0531:

yessi so multiply 3.14 by 3.8^2

snowflake0531:

remember, first do the squaring and then mutiply

lorena123:

wait what do i do with the 2

lorena123:

divide?

ScamTheMan:

I don't think you square the radius for circumference. The formula is 2πr

snowflake0531:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @ScamTheMan I don't think you square the radius for circumference. The formula is 2πr \(\color{#0cbb34}{\text{End of Quote}}\) right, when i do something wrong again-

lorena123:

??

snowflake0531:

do actually do 2 times 3.14 times 3.8

lorena123:

ok

lorena123:

23.86

lorena123:

is that correct?

snowflake0531:

yess, but round it to 23.9

lorena123:

oh ok thx

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