Surface Area of a Cone
Formula
Formula
Surface Area of a Cone = πrl
Surface Area of a Cone = πrl
Explore!
Explore!
Use the applet below to unroll a cone (with base radius r and slant height l ) into a sector to prove the Surface Area formula.
Use the applet below to unroll a cone (with base radius r and slant height l ) into a sector to prove the Surface Area formula.