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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 below, 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. $30deg, 150deg, and 30deg$
2. $45deg, 120deg, and 30deg$
3. $60deg, 150deg, and 45deg$
4. $90deg, 135deg, and 30deg$
9.
Refer to the figure below. 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: The measure of $ang4$ is $2//3 x$ and the measure of $ang2$ is 90. What is x?
1. 270
2. 135
3. 180
4. 90
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