Loading in 5 sec....

Unit #1, Concept #3 Angles and their MeasurementsPowerPoint Presentation

Unit #1, Concept #3 Angles and their Measurements

- By
**bluma** - Follow User

- 106 Views
- Uploaded on

Download Presentation
## PowerPoint Slideshow about ' Unit #1, Concept #3 Angles and their Measurements' - bluma

**An Image/Link below is provided (as is) to download presentation**

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript

Unit #1, Concept #3Angles and their Measurements

- What are angles and how are they classified?
- How are the measures of angles used to determine their congruency?
- What is angle addition and how is it used?

Free Template from www.brainybetty.com

Bell Ringer

With your partner…

Come up with a list of some things that you remember about angles.

Free Template from www.brainybetty.com

An angle ( )

- Is formed by two rays with the same endpoint.
- The two rays are the sides of the angles. The endpoint is called the vertex of the angle

Free Template from www.brainybetty.com

Postulate 1 – 7Protractor Postulate

- OA is paired with 0 and OB is paired with 180.
- If OC is paired with x and OD is paired with y, then m<COD = |x – y|.

D

C

y

x

A

B

Free Template from www.brainybetty.com

- Acute angles - an angle whose measure is between 0º and 90º.
- Right angle - an angle whose measure is 90º.

- Obtuse angle - an angle whose measure is between 90º and 180º.
- Straight angle - an angle whose measure is 180º

Free Template from www.brainybetty.com

- Classify each angle AOY
- as right, acute, obtuse or straight.

Y

X

Z

A

B

Free Template from www.brainybetty.com

- Classify each angle BOY
- as right, acute, obtuse or straight.

Y

X

Z

A

B

Free Template from www.brainybetty.com

- Classify each angle BOA
- as right, acute, obtuse or straight.

Y

X

Z

A

B

Free Template from www.brainybetty.com

- Classify each angle XOZ
- as right, acute, obtuse or straight.

Y

X

Z

A

B

Free Template from www.brainybetty.com

Find the measure of the followingAOX, XOY, YOZ, XOZ, YOB

Y

X

Z

A

B

Free Template from www.brainybetty.com

Let’s Get it Started

- What did the segment addition postulate state?

Free Template from www.brainybetty.com

Postulate 1 – 8 Angle Addition Postulate

- If point B lies in the interior of AOC, then
- m AOB + m BOC = m AOC.
- C
- B
- O
- A

Free Template from www.brainybetty.com

Using the Angle Addition Postulate

- m AOB = 54
- m AOC = 76 Find m BOC.
C

B

O

A

Free Template from www.brainybetty.com

Using the Angle Addition Postulate

- m COB = 2x + 6
- m AOB = 5x – 11 and m AOC =79
C

B

O find x

A

Free Template from www.brainybetty.com

Using the Angle Addition Postulate

- Find the measure of angle 1

153°

1

Free Template from www.brainybetty.com

Using the Angle Addition Postulate

- Find the value of x.

(3x + 5)°

(9x + 7)°

Free Template from www.brainybetty.com

- Journal Entry
- What are angles and how are they classified?
- 2. How are the measures of angles used to determine their congruency?
- 3. What is angle addition and how is it used?

Free Template from www.brainybetty.com

Classwork/Homework

- Page 30 – 32
- # 17 – 23 odd, 24 – 28 all, 47, 48, 56-67, 70, 75

Free Template from www.brainybetty.com

Unit #1, Concept #3Angles and their Measurements

- What are angles and how are they classified?
- How are the measures of angles used to determine their congruency?
- What is angle addition and how is it used?

Free Template from www.brainybetty.com

Download Presentation

Connecting to Server..