3D Polygons

[yeetus]

Hi everybody! Just wondering how to find the area of a cylinder and a cone

 

[tkhunny]

Generally, this sort of thing is proven by an unwrapping technique.

Just the formulas:

Cone vs Sphere vs Cylinder

We get this amazing thing that the volume of a cone and sphere together make a cylinder (assuming they fit each other perfectly)

www.mathsisfun.com

Certainly be careful to remember if you are to include the bases (or lids), or just the lateral surface area.

 

[Harry_the_cat]

You could always just google "surface area of cylinder" and then do it again for a cone!

 

[Dr.Peterson]

Just to help with terminology for the future, these are not polygons (flat shapes with straight sides); they are not even polyhedra (solid shapes with flat sides). They could be called solid figures; but just saying cones and cylinders in the title would have been clearest!