Math 7

Unit 8 Geometry

Lesson 8.2   Perpendicular Lines

Focus

The FOCUS section introduces the main concept that will be covered in the lesson.

Use different methods to construct and identify perpendicular line segments.

TEXT Page 303

Read/Work through the  Focus  section at the top of page 303 in  your textbook.

Watch

Video Tutorial

Explore

Explore an idea or problem.
The exploration provides the background for the ideas presented in the lesson.

TEXT Page 303

Read/Work through the  Explore  section on Page BLAH in your textbook.

You can do this activity on your own.
Do your best to answer the questions, then watch the Video Tutorial for help or to check your answers.

Watch

Video Tutorial

Connect

Connect summarizes the math in the lesson.
A presentation of ideas connected to the lesson focus.

Depending on the tools you have available,  you have options for creating perpendicular lines.
The most important thing to understand is that perpendicular lines meet at a 90° angle  (they form a right angle)

TEXT Pages 303 - 304

Read/Work through the  Connect  section on Pages 303 - 304  in your textbook.

I covered these techniques in the Explore video.

Example

The Example will give you TOOLS for solving problems, and also show you that there may be different ways to approach a question.

Example

TEXT Page 304

Work through the Example  on Page 304 in your textbook.

Watch

Video Tutorial

Animation

This website gives a nice animation of a compass and straight-edge method for constructing perpendicular lines.

This website also has  a nice animation of a compass and straight-edge method for constructing perpendicular lines.

Practice Problems

Doing Practice Problems

Practice problems reinforce the math presented in this lesson.

•	Work through the practice problems for this lesson.
	These problems are for practice, you don’t need to hand them in!
	(your teacher may assign specific questions for you to complete)

•	Use the answers in the back of the book to CHECK YOUR WORK!

•	If you make a mistake, TRY TO FIX IT!

•	If you need help or want more information, view the video solutions provided.

•	If you still need more help,  CONTACT YOUR TEACHER!

Types of Practice Problems

Assessment Focus a question that gives a good example of the kind of question you would be expected to answer after completing the lesson

Take It Further questions offer enrichment and extension.

Notes

Question 2,    I didn’t do a video for this one.

Question 3,    I didn’t do a video for this one.

Question 4,    I didn’t do a video for this one.
(I gave some examples of real life perpendicular lines in the Focus video)

Question 5,     I didn’t do a video for this one.
 If you want to print the diagram and actually check,  here is a link to a document you can download and print.
If you want to check that lines ARE perpendicular,  you would use your protractor and check that the lines meet at 90° to each other.
The textbook lists these segments as being perpendicular.
AE and FR
BR and KL
AE and AC
AC and BL
FH and GJ
ED and DL
FR and RB

Video Solution Links

Check your work for every problem you do!
If you make a mistake,  try to fix it!
Use the video solutions for more information.
If a problem still doesn’t make sense, ASK YOUR TEACHER FOR HELP!

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