11.3 Derive Lateral Area of a Cone
- Author:
- Janelle Nowaczyk, soongy
You know that the lateral area of a regular pyramid, is , where is the perimeter of the base and is the slant height. This formula can be derived by adding up the area of each lateral face. (See section 11.3).
How about the lateral area of a cone? Two methods of deriving the formula () are presented here.