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# Measures of Angles (Grade 8)

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## Measures of Angles

1.
Approximate the measure of the angle shown.
1. 60 degrees
2. 270 degrees
3. 75 degrees
4. 100 degrees

2.
Find the measure of one angle of the following polygon.
1. $135deg$
2. $1080deg$
3. $1440deg$
4. $180deg$
3.
Find the measure of one angle of a regular decagon.
1. $1440deg$
2. $144deg$
3. $1800deg$
4. $900deg$

4.
Find the measure of one angle of a regular dodecagon.
1. $1800deg$
2. $2160deg$
3. $150deg$
4. $1080deg$
5.
Find the measure of one angle of a regular 20-gon.
1. $3240deg$
2. $3600deg$
3. $1800deg$
4. $162deg$

6.
Given a polygon with angle measures $100deg$, $105deg$, and $130deg$, there is one more angle. What is the measure of the last angle?
1. $25deg$
2. $115deg$
3. $205deg$
4. $425deg$
7.
In the figure, if angle 1 is $100deg$, what is the measure of angle 5?
1. $80deg$
2. $100deg$
3. $110deg$
4. $140deg$

8.
The measure of $ang 1$ is $150deg$. What are the measures of $ang4, ang3, and ang2$?
1. $30deg, 150deg, 30deg$
2. $45deg, 120deg, 30deg$
3. $60deg, 150deg, 45deg$
4. $90deg, 135deg, 30deg$
9.
Refer to the figure. The measure of $ang4$ is $5x$ and the measure of $ang2$ is $91-2x$. What is $x$?
1. 44.5
2. 12.7
3. 36
4. 13

10.
Given the following figure, where the measure of $ang4$ is $2/3 x$ degrees and the measure of $ang2$ is 90°, what is the value of x?
1. 270
2. 135
3. 180
4. 90
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