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 campy Joined: Feb 2009 Posts: 1,080 Senior Member
campy

Joined: Feb 2009
Posts: 1,080
Senior Member
Does any one
04-20-2013, 11:31 AM
 #1

have an answer for the on going question: How many faces on a cylinder/cone?? I know it has been discussed before, but I was hoping common core might have addressed it somewhere and I just can't find it. We actually contacted the district guru and got some weird gibberish answer trying to avoid a definite answer. I was hoping that I could take the common core answer in and put an end to the debate. TIA

 klh2 Joined: Aug 2006 Posts: 769 Senior Member
klh2

Joined: Aug 2006
Posts: 769
Senior Member
check out this website
04-20-2013, 02:35 PM
 #2

www dot louisianaschools dot net/lde/uploads/18873 dot pdf

page 47 #10

Although it doesn't really answer the "How many faces" question, it ends the need to use common language.
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 1956BD Joined: Aug 2007 Posts: 24,685 Senior Member
1956BD

Joined: Aug 2007
Posts: 24,685
Senior Member
Maybe this math dictionary will help
04-21-2013, 12:51 PM
 #3

http://www.amathsdictionaryforkids.com/dictionary.html

It says a cylinder has one curved face and two congruent circular bases.

 campy Joined: Feb 2009 Posts: 1,080 Senior Member
campy

Joined: Feb 2009
Posts: 1,080
Senior Member
I guess the problem still exists
04-21-2013, 01:12 PM
 #4

I was hoping common core had addressed it somewhere. Our math books (HM in fourth grade) state that the cylinder, cone and sphere have 0 faces because faces have to be polygons. So the debate continues.....

 campy Joined: Feb 2009 Posts: 1,080 Senior Member
campy

Joined: Feb 2009
Posts: 1,080
Senior Member
But.....
04-21-2013, 01:12 PM
 #5

thanks for the help!!

 1956BD Joined: Aug 2007 Posts: 24,685 Senior Member
1956BD

Joined: Aug 2007
Posts: 24,685
Senior Member
Oops
04-21-2013, 01:52 PM
 #6

Sorry I was no help. Now I am curious to find the correct answer as well.

 Alicia G Joined: Apr 2006 Posts: 4,148 Senior Member
Alicia G

Joined: Apr 2006
Posts: 4,148
Senior Member

04-21-2013, 02:57 PM
 #7

A quick google search brings up the answer of two faces per cone (a wrapped face and a circular face) but I did find a site saying zero for reasons PP mentioned!

Old discussion: http://www.proteacher.net/discussion...ad.php?t=34076

I think that "less than 3" covers it for a cone and "less than 4" covers it for a cylinder!

 klh2 Joined: Aug 2006 Posts: 769 Senior Member
klh2

Joined: Aug 2006
Posts: 769
Senior Member
This is probably why
04-23-2013, 04:55 AM
 #8

they removed it from CCSS. Makes one question who would be the top dog who would end this uncertainty and debate by designating just one definition. Is anyone sailing this ship?

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