.. A is for Angle An angle is two rays sharing a common end point.
1.4 Measure and Classify Angles. Definitions Angle – consists of two different rays with the same...
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1.4 Measure and Classify Angles
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Transcript of 1.4 Measure and Classify Angles. Definitions Angle – consists of two different rays with the same...
![Page 1: 1.4 Measure and Classify Angles. Definitions Angle – consists of two different rays with the same endpoint. B C vertex The rays are the sides of the angle.](https://reader036.fdocuments.in/reader036/viewer/2022083008/56649f3c5503460f94c5a8e2/html5/thumbnails/1.jpg)
1.4 Measure and Classify Angles
![Page 2: 1.4 Measure and Classify Angles. Definitions Angle – consists of two different rays with the same endpoint. B C vertex The rays are the sides of the angle.](https://reader036.fdocuments.in/reader036/viewer/2022083008/56649f3c5503460f94c5a8e2/html5/thumbnails/2.jpg)
Definitions
Angle – consists of two different rays with the same endpoint.
B
C
vertex
The rays are the sides of the angle.The endpoint is the vertex of the angle.
A
sides
This angle can be named BAC or CAB or A.
![Page 3: 1.4 Measure and Classify Angles. Definitions Angle – consists of two different rays with the same endpoint. B C vertex The rays are the sides of the angle.](https://reader036.fdocuments.in/reader036/viewer/2022083008/56649f3c5503460f94c5a8e2/html5/thumbnails/3.jpg)
Classifying Angles
Acute Angle: less than 90º
Right Angle: equals 90º
Obtuse Angle: more than 90º
Straight Angle: equals 180º
A
B
C
D
![Page 4: 1.4 Measure and Classify Angles. Definitions Angle – consists of two different rays with the same endpoint. B C vertex The rays are the sides of the angle.](https://reader036.fdocuments.in/reader036/viewer/2022083008/56649f3c5503460f94c5a8e2/html5/thumbnails/4.jpg)
Angle Addition Postulate
If P is in the interior of RST, then
R
S
T
P
m RST = m RSP + m PST
![Page 5: 1.4 Measure and Classify Angles. Definitions Angle – consists of two different rays with the same endpoint. B C vertex The rays are the sides of the angle.](https://reader036.fdocuments.in/reader036/viewer/2022083008/56649f3c5503460f94c5a8e2/html5/thumbnails/5.jpg)
Congruent Angles
Two angles are congruent if they have the same measure.
A B
24º 24º
so A = B~m A = m B