11.2: Volume and Surface Area of Cones

1) Lesson Objectives:

You should be able to

• state and use the formula for volume of cone

• state and use the formula for surface area of cone

Success Criteria:

I am able to

• use the formula of volume of cone to solve problems.

• use the formula of surface area of cone to solve problems.

Always look through all examples in textbook before lesson.

NOTE:

Curved surface area of a cone is formed by a Sector.

A sector is part of a circle. It can be a minor sector (Pizza) or major sector (PacMan).

When the radius of any sectors are joined together, it will form a cone.

The joined radius will form the slant height of the cone. which will be used to find curved surface area of cone.

The perpendicular height from the apex to the centre of the cone is used to find volume of cone.

The curved part of the sector (which is part of the circumference of the circle) will form the base of the cone which is a circle.

Videos on Cone

Volume of Cone

Surface Area of Cone