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when your using an angle ruler, otherwise known as the protractor, you start by lining up the line (located at hte center of the bottom area) with the point of the angle where the two lines of it meet. then you you line up the line with whatever number it would continue onto.
example: L is a 90 degree angle. if u lined up the part of it pointing upward with a number on the curved part of the protractor, it would point directly at 90.
My daughter in 5th grade would like me to mention that she answered this question, and i typed it here. she also gave the example.
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How do you construct a 120 degree angle?
use a protractor and a ruler
How do you make a 110 degree angle using a ruler and a compass?
use trisection method
What is used to draw right angles?
I generally use a pencil and ruler. To construct the right angle to draw it I also use compasses. To measure the right angle to draw it I also use a protractor.
What can you use to measure angles other than a protractor?
A ruler. Add a line to make the angle into a triangle, measure the sides and use trigonometry.
How do you bisect an angle using a ruler or double straightedge?
create a 'v' parralel to the 'v' of your angle using the width of your ruler, join the two apexes and continue the line to biscect the angle.
