## Math 7B, Lesson 13, Spring 2022, 5/22/2022

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## 13.1Volumes and total surface areas of a cube and a cuboid

• concept of net

A net of a solid is a plane figure that can be folded up to form the solid.

• volume and total surface

The volume of cube = x*x*x
The total surface area of cube = 6x*x
where x is the length of a side of the cube

The volume of cuboid = Length x Width x Height = l*w*h
The total surface area of cuboid = 2*(lw + lh + wh)

• HW
• handout: two pages
• workbook: page 35, #1, #2, #3

## Math 7B, Lesson 12, Spring 2022, 5/15/2022

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Exam on Chapter 12 Perimeters and Area of Plane Figures.

## Math 7B, Lesson 11, Spring 2022, 5/8/2022

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## Chapter 12.5 Perimeters and Areas of Composite Plane Figures

There are many shapes around us that are formed by joining two or more basic geometric shapes. Their perimeters and areas can be found by applying the formulas for the basic shapes.

Lots of examples in the classroom.

## HW assignment

Handout:

• two pages

Workbook:

• page 28: 9, 10
• page 29: 13, 14
• page 31: 19, 20
• page 33: 25
• page 34:28

## Math 7B, Lesson 10, Spring 2022, 5/1/2022

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## Chapter 12 Perimeters and Area of Plane Figures

12.3 Area of a parallelogram

A lot of examples in class.

12.4. Area of a trapezoid

A lot of examples in class.

Home Assignment:

Handout:

• 5 pages

Workbook:

• page 26, #6
• page 27, #7, #8