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In this Instructable you will learn how to find the Area of a Cylinder.
Supplies:
Pencil (needed for it's erase-ability)
Paper
Calculator
Optional:
Can
Can opener
Tin Snips
Warning:
Cutting open a tin can leaves VERY SHARP EDGES. I wore leather gloves when flattening out my can, I suggest you do the same. Please do not cut yourself as this will lead to bleeding and 9 out of 10 doctors agree that bleeding outside of the body is bad.
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Supplies:
Pencil (needed for it's erase-ability)
Paper
Calculator
Optional:
Can
Can opener
Tin Snips
Warning:
Cutting open a tin can leaves VERY SHARP EDGES. I wore leather gloves when flattening out my can, I suggest you do the same. Please do not cut yourself as this will lead to bleeding and 9 out of 10 doctors agree that bleeding outside of the body is bad.
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Signing UpStep 1Visualize the Surface Area
Area of a Cylinder
(Surface Area of a Cylinder to be more correct)
This is a concept that is sometimes easier to understand if you can visualize what is happening.
To find the surface area of 3D object, you add of the areas of all the 2D pieces.
The 2D representation of a 3D object is called a Net
You can use an empty tin can to make the Net of a Cylinder.
(not all tin cans are created equal, you need one
with a lip on the top and bottom)
*wear leather gloves for this part to avoid cuts*
1) Use the can opener to open the top
2) Leave just a little bit uncut so that the top stays attached
3) Drain and rinse the can
4) Use the can opener to open the bottom
5) Use the tin snips to cut down the side of the can
6) Flatten the can by stretching open the sides
(I stepped on the can to flatten all the way)
Congratulations, you have just made a 2D Net of a 3D cylinder!
***********************************************************
(Surface Area of a Cylinder to be more correct)
This is a concept that is sometimes easier to understand if you can visualize what is happening.
To find the surface area of 3D object, you add of the areas of all the 2D pieces.
The 2D representation of a 3D object is called a Net
You can use an empty tin can to make the Net of a Cylinder.
(not all tin cans are created equal, you need one
with a lip on the top and bottom)
*wear leather gloves for this part to avoid cuts*
1) Use the can opener to open the top
2) Leave just a little bit uncut so that the top stays attached
3) Drain and rinse the can
4) Use the can opener to open the bottom
5) Use the tin snips to cut down the side of the can
6) Flatten the can by stretching open the sides
(I stepped on the can to flatten all the way)
Congratulations, you have just made a 2D Net of a 3D cylinder!
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