Surface Area of a Cone

A cone has two main 'surface areas' .

the lateral surface area: this is the red region on the 'side' of the cone. (formula for lateral surface area)

total surfrace area: This is the lateral surface area plus the area of the circular bottom.

Formula for Lateral Surface Area

Formula for Total Area of a cone

The total area of a cone is the sum is of the lateral surface area and the area of the circular bottom of the cone.