Formulas Explained: Area of Cone, Volume of Cone, Volume of Sphere
Formulas Explained: Area of Cone, Volume of Cone, Volume of Sphere
Formula for the Lateral Area of a Cone: Video I
In this first video of “geometry formulas explained” we explain why the lateral area of a cone is pi*radius*slant height. Such formulas are often given to geometry students with no explanation. Here’s an explanation!
Formula for the Volume of a Cone: Video II
In this second video of “geometry formulas explained” we explain why the volume of a cone is 1/3 the volume of the cylinder that surrounds it. This is a bit of a meaty video and will take some work to follow properly - but the goods are all there.
Formula for the Volume of a Sphere: Video III
In this third video of “geometry formulas explained” we show how Archimede’s deduced found the volume of a sphere. To do so he had to use a formula for the volume of a cone (which we derive in video II).
| Check out our most popular games! | ||
|---|---|---|
 Fraction Concoction |
 Fact Family Game |
 Number Bond Garden |
 Online Addition Subtraction Game |
 Penguin Solitaire |
 Sawayama Solitaire |
 Ark Solitaire |
 Eldritch Invasion |
 Shenzhen Solitaire |
Check out more Solitaire games here.
We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.