Warm Up

(Hint: Add up the area of the 6 faces)

Surface Area of Prisms

Objective• Understand what’s lateral area and surface

area.• To find the surface area of a prism.

Prisms, bases, lateral faces

Right prism vs. Oblique prism

Theorem 11-1

Practice*Use a net to find the surface area of each prism.

Practice

• Use formulas to find the surface area of each prism. Round your answer to the nearest whole number.

Homework• P704: 8, 10, 11, 12, 21, 25-a, b, c

Warm Up

1. If you cut the paper towel roll along the dashed line and laid the cardboard flat, what shape would you have?2. What are the dimensions of the shape?3. What does the string represent on the shape?4. How can you find the length of the string?

Surface Area of Cylinders

Objective• To find the surface area of a cylinder.

Cylinder

Lateral area and surface area of a cylinder

Lateral and Surface Areas of a Cylinder

Practice*

Find the lateral area of the cylinder to the nearest whole number.

Finding lateral Area of a Cylinder

1. When a roller is used, what is the width of paint applied to the floor with one complete rotation of the roller?

2. What is the shape of the paint applied to the floor?3. How can you use the diameter instead of the radius in the

formula for lateral area?

Finding Surface Area of a Cylinder*

Find the surface area of the cylinder in terms of

Homework

• P704: 14, 16, 17, 19, 20, 22, 29