Author Topic: oh lol i did nvm ggg (Read 1681 times)

ResonKinetic · October 10, 2014, 01:20:53 AM

I'm wondering because when I checked the answer key, there was this thing that said "P = 2(circumference of circle with radius 1 foot)" before the rest of the answer.

I couldn't make heads or tails of it so I panicked.

help me

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Blockaium · October 10, 2014, 01:36:15 AM

image
it fixksted

Foxscotch · October 10, 2014, 01:37:12 AM

http://i.imgur.com/9AsjHGH.jpg

ResonKinetic · October 10, 2014, 01:40:47 AM

I think I get it, but the way the book put it went maximum handicap and decided to not make sense.

Ninja Decoy · October 10, 2014, 01:42:57 AM

It should be correct. I honestly forgot for a sec if it was Pi x diameter or Radius² x Pi.

I think using the radius is for area.

ResonKinetic · October 10, 2014, 01:45:39 AM

Quote from: Ninja Decoy on October 10, 2014, 01:42:57 AM

It should be correct. I honestly forgot for a sec if it was Pi x diameter or Radius² x Pi.

I think using the radius is for area.

yeah, diameter is 2(r) or r = D/2 if you like and radius is the distance between the center and the outside

Still, I'd like to see a post by a math major just to be sure.

Ninja Decoy · October 10, 2014, 01:54:11 AM

Quote from: ResonKinetic on October 10, 2014, 01:45:39 AM

yeah, diameter is 2(r) and radius is the distance between the center and the outside

Well yeah, thats not what i was saying though.

Radius² is not that same as 2r.

a diameter of 16 would have an 8 radius, and 8² is 64, not 16. 2r is just simple math used to find the diameter from the radius, nothing more.

No, i was confused because i forgot is you used Diameter or radius for circumference, and then i remembered.

Also, the area for that figure would be 10.28

ResonKinetic · October 10, 2014, 01:59:59 AM

Quote from: Ninja Decoy on October 10, 2014, 01:54:11 AM

Well yeah, thats not what i was saying though.

Radius² is not that same as 2r.

a diameter of 16 would have an 8 radius, and 8² is 64, not 16. 2r is just simple math used to find the diameter from the radius, nothing more.

No, i was confused because i forgot is you used Diameter or radius for circumference, and then i remembered.

Also, the area for that figure would be 10.28

ooohhhh i thought you misspoke since i hadn't said anything about the area

my bad

Tetris · October 10, 2014, 02:01:20 AM

ResonKinetic · October 10, 2014, 02:02:48 AM

Quote from: Tetris on October 10, 2014, 02:01:20 AM

you may have just made it possible for me to get through the night.

Jubel · October 10, 2014, 02:03:19 AM

it looks like your answer is halfway there

ResonKinetic · October 10, 2014, 02:03:59 AM

Quote from: Jubel on October 10, 2014, 02:03:19 AM

it looks like your answer is halfway there

What do you mean?

Jubel · October 10, 2014, 02:08:03 AM

i actually lied and did it wrong, it is correct

ResonKinetic · October 10, 2014, 02:12:50 AM

Quote from: Jubel on October 10, 2014, 02:08:03 AM

i actually lied and did it wrong, it is correct

okay then

apparently my logic isn't flawed and i am perfectly fine.

thanks for the confirmation everyone