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How do I draw angles using a ruler and protractor? Specifically, how to draw a 22 degree angle and a 250 degree angle?
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2 partsStep-by-step solution
11 stepsTo draw angles using a ruler and protractor, follow these steps:
Part a· 5 steps
Use a ruler to draw a straight line segment.
This will be the first arm of your angle. Mark one endpoint of this line as the vertex of the angle.
Place the center of your protractor exactly on the vertex you marked.
Align the baseline of the protractor with the straight line you drew, ensuring the mark is on the line.
Locate the mark on the protractor scale (usually the inner scale if measuring from the right, or outer scale if measuring from the left).
Make a small dot on your paper at this mark.
Remove the protractor.
Use your ruler to draw a straight line segment from the vertex to the dot you made. This is the second arm of your angle.
The angle formed between the two lines is .
Part b
Since a standard protractor measures up to , to draw an angle greater than , you need to use the concept of a reflex angle. A angle is a reflex angle.
Calculate the conjugate angle (the angle that completes a full circle of ).
Use a ruler to draw a straight line segment.
Mark one endpoint as the vertex.
Place the center of your protractor on the vertex and align its baseline with the line you drew.
Locate the mark on the protractor scale and make a small dot.
Remove the protractor.
Use your ruler to draw a straight line segment from the vertex to the dot.
The smaller angle you have drawn is .
The reflex angle (the larger angle outside the angle, going around the other way) is .
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