The “food pyramid” is a triangular diagram of suggested food servings. However a pyramid has at least two other sides, plus a side that is the base.
 
“It’s the food PYRAMID right? So…what’s on the other two sides?? I mean it’s not the food TRIANGLE! Brand new food groups yet undiscovered!” was posted on Twitter on August 20, 2010. “We only see one face of the food pyramid. what delicious foods are they hiding on the other two sides” was posted on Twitter on October 8, 2015. “Since it’s not called the food triangle I’ve always wondered what’s on the other three sides of the food pyramid” was posted on Twitter on October 14, 2015.

“The food pyramid is a ‘pyramid’ not ‘triangle,’ so what’s on the other sides?” was posted on Reddit—Shower Thoughts on December 22, 2017.
 
 
Wikipedia: Food pyramid (nutrition)
A food pyramid or diet pyramid is a triangular diagram representing the optimal number of servings to be eaten each day from each of the basic food groups. The first pyramid was published in Sweden in 1974. The 1992 pyramid introduced by the United States Department of Agriculture (USDA) was called the “Food Guide Pyramid”. It was updated in 2005, and then it was replaced by MyPlate in 2011.
     
Twitter
Erik Lanigan‏
@eriklanigan
It’s the food PYRAMID right? So…what’s on the other two sides?? I mean it’s not the food TRIANGLE! Brand new food groups yet undiscovered!
8:47 PM - 20 Aug 2010
   
Twitter
The Mountain Goats‏
@mountain_goats
we only see one face of the food pyramid. what delicious foods are they hiding on the other two sides
8:22 AM - 8 Oct 2015
   
Twitter
John‏
@R_R_Rye
Since it’s not called the food triangle I’ve always wondered what’s on the other three sides of the food pyramid.
7:25 AM - 14 Oct 2015
   
Twitter
Mike Ginn‏
@shutupmikeginn
The fact that they call it the Food Pyramid and not Food Triangle implies it has at least two other sides.  So maybe this much taffy is OK
12:09 AM - 25 Feb 2016
 
Twitter 
Tatiana‏
@DarkBitchyKitty
Food pyramid makes no sense, what’s on the other sides?
10:24 PM - 24 May 2016
   
Twitter
justthisguyyouknow?‏
@bemusedgeek
It’s a food pyramid guys. What’s on the other sides that we aren’t seeing???
4:33 PM - 25 May 2016
   
Twitter
The Dis”ass”ter Artist (Hank Hill has no ass)‏
@MustacheDad
Folks have you ever wondered what’s on the other sides of the food pyramid? It’s fruit roll ups. Nothing but fruit roll ups
7:02 PM - 28 May 2016
     
Twitter
Potato Otter But Fifty Characters‏
@potatootter
What’s on the other three sides of the food pyramid?
9:14 PM - 1 Aug 2016
 
Twitter
Mike T 🍔‏
@Mike35230
I want to know what’s on the other sides of the food pyramid.
7:59 PM - 12 Sep 2016
     
Reddit—Shower Thoughts
What kind of food are on the other two sides of a food pyramid?
submitted March 8, 2017 by scribbles33
COMMENTS
Servania
Sir have you seen an Egyptian pyramid square base man 4 sides
 
Twitter
B-mac™‏
@BmacGOAT
If it’s a food pyramid what’s on the other sides? Why do we only get to see one side?
1:13 AM - 4 May 2017
 
Reddit—Shower Thoughts
The food pyramid is a “pyramid” not “triangle,” so what’s on the other sides?
submitted December 22, 2017 by The_Koifish
 
Twitter
Shower Thoughts‏
@Thoughts4Shower
The food pyramid is a “pyramid” not “triangle,” so what’s on the other sides?
#showerthoughts
8:34 PM - 21 Dec 2017 (Posted after the above.—ed.)