How to find the surface area of a cone flipped upside down

The video tutorial explains how to calculate the surface area of a circle and a cone. It begins with an introduction to surface area, followed by a detailed explanation of calculating the base area using the formula πR^2. The tutorial then covers the lateral area of a cone using the formula πRL, where L is the slant height. A step-by-step example is provided to demonstrate the complete surface area calculation. The session concludes with a Q&A segment and information about test formats.

What is the formula for the area of the base of a circle?

• 2πR

• πRL

• πR^2

• R^2

Which formula is used to calculate the lateral area of a cone?

• R^2

• 2πR

• πRL

• πR^2

In the example calculation, what is the radius of the base?

• 9

• 81

• 153

• 17

What is the slant height used in the example calculation?

• 153

• 81

• 17

• 9

What is the final surface area calculated in the example?

• 81 square millimeters

• 735.1 square millimeters

• 153.1 square millimeters

• 63.9 square millimeters