To view this presentation, you'll need to enable Flash.

Show me how

After you enable Flash, refresh this webpage and the presentation should play.

Loading...

PPT – Section 33, Parallel Lines and the Triangle AngleSum Theorem PowerPoint presentation | free to view - id: 12c325-ZWVmN

The Adobe Flash plugin is needed to view this content

View by Category

Presentations

Products
Sold on our sister site CrystalGraphics.com

About This Presentation

Write a Comment

User Comments (0)

Transcript and Presenter's Notes

- Section 3-3, Parallel Lines and the Triangle

Angle-Sum Theorem - Draw and cut out a large triangle.
- Number the angles and tear then off.
- Place the three angles adjacent to each other

form one straight angle. - a. What can you say about the sum of the

measures of the angles of a triangle?

2

3

1

- Theorem 3-7, Triangle Angle-Sum Theorem The sum

of the measures of the angles of a triangle is

180o. - Example Find m?1.
- m?1 35 65 180
- m?1 100 180
- m?1 80

C

B

A

1

65o

35o

- Student example Find the values of x, y, and z.

G

39 65 X 180 104 X 180 X 76

39o

21o

X Y 180 76 Y 180 Y 104

65o

zo

yo

xo

F

H

J

21 104 Z 180 125 Z 180 Z 55

How could we use ?GFH instead of ?GJH to find the

value of z.

For ?GFH, 65 (39 21) Z 180 Then 125 Z

180 and Z 55

- Student example In triangle ABC, ?ACB is a right

angle, and CD AB. Find the values of a, b,

and c.

C

70o

co

ao

bo

B

A

D

c 20

b 20

a 70

- Classifying a triangle by its angles and sides.
- Equiangular all angles congruent
- Acute all angles acute
- Right one right angle
- Obtuse one obtuse angle
- Equilateral all sides congruent
- Isosceles at least two sides congruent
- Scalene no sides congruent
- Classify the triangle by its sides
- and angles.

Acute Isosceles

- Draw and mark a triangle to fit each description.

If no triangle can be drawn, write not possible

and explain why. - Acute scalene
- Isosceles right
- Obtuse equiangular

Not possible an equilateral triangle has all

acute angles

- Exterior angle of a polygon is an angle formed

by a side and an extension of an adjacent side.

For exterior angles of a triangle, the two

nonadjacent interior angles are its remote

interior angles.

Exterior angle

1

3

2

Remote interior angles

- Theorem 3-8, Triangle Exterior Angle Theorem The

measures of each exterior angle of a triangle

equals the sum of the measures of its two remote

interior angles.

2

1

3

- Example find the measure of the missing angle.

2

113o

70o

- Student example find the measure of the missing

angle.

40o

1

30o

- Student example Explain what is wrong with this

diagram. - The measure of the exterior angle needs to be

greater than either remote interior angles.

B

80o

85o

C

A

D

- Homework
- Page 134-136
- Questions 2-8, 14-18, 26, 27, 31, 32, 38

About PowerShow.com

PowerShow.com is a leading presentation/slideshow sharing website. Whether your application is business, how-to, education, medicine, school, church, sales, marketing, online training or just for fun, PowerShow.com is a great resource. And, best of all, most of its cool features are free and easy to use.

You can use PowerShow.com to find and download example online PowerPoint ppt presentations on just about any topic you can imagine so you can learn how to improve your own slides and presentations for free. Or use it to find and download high-quality how-to PowerPoint ppt presentations with illustrated or animated slides that will teach you how to do something new, also for free. Or use it to upload your own PowerPoint slides so you can share them with your teachers, class, students, bosses, employees, customers, potential investors or the world. Or use it to create really cool photo slideshows - with 2D and 3D transitions, animation, and your choice of music - that you can share with your Facebook friends or Google+ circles. That's all free as well!

For a small fee you can get the industry's best online privacy or publicly promote your presentations and slide shows with top rankings. But aside from that it's free. We'll even convert your presentations and slide shows into the universal Flash format with all their original multimedia glory, including animation, 2D and 3D transition effects, embedded music or other audio, or even video embedded in slides. All for free. Most of the presentations and slideshows on PowerShow.com are free to view, many are even free to download. (You can choose whether to allow people to download your original PowerPoint presentations and photo slideshows for a fee or free or not at all.) Check out PowerShow.com today - for FREE. There is truly something for everyone!

You can use PowerShow.com to find and download example online PowerPoint ppt presentations on just about any topic you can imagine so you can learn how to improve your own slides and presentations for free. Or use it to find and download high-quality how-to PowerPoint ppt presentations with illustrated or animated slides that will teach you how to do something new, also for free. Or use it to upload your own PowerPoint slides so you can share them with your teachers, class, students, bosses, employees, customers, potential investors or the world. Or use it to create really cool photo slideshows - with 2D and 3D transitions, animation, and your choice of music - that you can share with your Facebook friends or Google+ circles. That's all free as well!

For a small fee you can get the industry's best online privacy or publicly promote your presentations and slide shows with top rankings. But aside from that it's free. We'll even convert your presentations and slide shows into the universal Flash format with all their original multimedia glory, including animation, 2D and 3D transition effects, embedded music or other audio, or even video embedded in slides. All for free. Most of the presentations and slideshows on PowerShow.com are free to view, many are even free to download. (You can choose whether to allow people to download your original PowerPoint presentations and photo slideshows for a fee or free or not at all.) Check out PowerShow.com today - for FREE. There is truly something for everyone!

presentations for free. Or use it to find and download high-quality how-to PowerPoint ppt presentations with illustrated or animated slides that will teach you how to do something new, also for free. Or use it to upload your own PowerPoint slides so you can share them with your teachers, class, students, bosses, employees, customers, potential investors or the world. Or use it to create really cool photo slideshows - with 2D and 3D transitions, animation, and your choice of music - that you can share with your Facebook friends or Google+ circles. That's all free as well!

For a small fee you can get the industry's best online privacy or publicly promote your presentations and slide shows with top rankings. But aside from that it's free. We'll even convert your presentations and slide shows into the universal Flash format with all their original multimedia glory, including animation, 2D and 3D transition effects, embedded music or other audio, or even video embedded in slides. All for free. Most of the presentations and slideshows on PowerShow.com are free to view, many are even free to download. (You can choose whether to allow people to download your original PowerPoint presentations and photo slideshows for a fee or free or not at all.) Check out PowerShow.com today - for FREE. There is truly something for everyone!

For a small fee you can get the industry's best online privacy or publicly promote your presentations and slide shows with top rankings. But aside from that it's free. We'll even convert your presentations and slide shows into the universal Flash format with all their original multimedia glory, including animation, 2D and 3D transition effects, embedded music or other audio, or even video embedded in slides. All for free. Most of the presentations and slideshows on PowerShow.com are free to view, many are even free to download. (You can choose whether to allow people to download your original PowerPoint presentations and photo slideshows for a fee or free or not at all.) Check out PowerShow.com today - for FREE. There is truly something for everyone!

Recommended

«

/ »

Page of

«

/ »

Promoted Presentations

Related Presentations

Page of

Home About Us Terms and Conditions Privacy Policy Presentation Removal Request Contact Us Send Us Feedback

Copyright 2018 CrystalGraphics, Inc. — All rights Reserved. PowerShow.com is a trademark of CrystalGraphics, Inc.

Copyright 2018 CrystalGraphics, Inc. — All rights Reserved. PowerShow.com is a trademark of CrystalGraphics, Inc.

The PowerPoint PPT presentation: "Section 33, Parallel Lines and the Triangle AngleSum Theorem" is the property of its rightful owner.

Do you have PowerPoint slides to share? If so, share your PPT presentation slides online with PowerShow.com. It's FREE!