because it is easier to hold the cylinder than to hold the square prism and cylinder tins can be opened easily not like square prisms
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The cross section of a sphere is most often a circle. When the cross section is taken parallel to the base of a cylinder, it is also a circle.
The foods that are at the top of the pyramid (fats) are the foods that you shouldn't eat so much of (that's why it's so small). The foods at the bottom of the pyramid (carbs) they recommend you eat the most of (that's why it's so big).
Most of our oranges are packed and sent out of state. I was in NYC and saw fruit from my area in California being sold in the sidewalk markets.
Nutritionists use math by counting calories, carbs, trans fats and others in most foods.
The most general difference is: > The formula for the surface area of anything with a curved surface and edge will involve 'pi'. > The formula for the surface area of anything with only flat surfaces and straight edges won't.