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Calcmathlete
Group Title
What are triangular numbers, pentagonal numbers, etc?
 one year ago
 one year ago
Calcmathlete Group Title
What are triangular numbers, pentagonal numbers, etc?
 one year ago
 one year ago

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KingGeorge Group TitleBest ResponseYou've already chosen the best response.2
Triangular numbers are of the form \[1+2+...+n=\frac{n(n+1)}{2}\]
 one year ago

KingGeorge Group TitleBest ResponseYou've already chosen the best response.2
Square numbers are \[1,4,9,...\]
 one year ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.2
dw:1344055445671:dw
 one year ago

KingGeorge Group TitleBest ResponseYou've already chosen the best response.2
Basically, if you were to draw out the shape, and fill it with dots, that would be your "____" number where you fill in ____ with triangular, square, pentagonal and so on.
 one year ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.0
Is that really all it is? I thought that it was more complex for some reason...thank you :)
 one year ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.2
dw:1344055538341:dw
 one year ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.2
are they ment to start at n=0 or at n=1?
 one year ago

KingGeorge Group TitleBest ResponseYou've already chosen the best response.2
That's really there is. So the hexagonal numbers would be modeled bydw:1344055645318:dwand you get exactly 15 dots which is the third hexagonal number.
 one year ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.0
Alright. I just wanted to know because my textbook gave me a formula for the xth number of an ngon, but I had no idea what it was talking about. Again, thank you :)
 one year ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.2
is zero a triangular/square/pentagonal,.... number???
 one year ago

KingGeorge Group TitleBest ResponseYou've already chosen the best response.2
I don't think 0 is usually listed as one of these numbers. But formally, I think it is a triangular/square/pentagonal number .
 one year ago
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