How to Construct an Angle Whose Sides Are All the Same Length
When you say you want to get the right angle on something, you're saying you want to approach what you have in mind from the right direction. This is because angles indicate direction. And if you put three angles together to make a triangle, you can use that triangle to find geographic distances and position. This is the key to triangulation. Given the usefulness of angles, you might want to practice drawing your own equal-sided angles.
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Instructions
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1
Place a piece of paper on the table in front of you so that the long edge of the paper is parallel to the edge of the table.
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Decide how long each side of your angle will be. For example, you decide each side will be five inches long.
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Add one to the number you have chosen. For example, 1 + 5 = 6.
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Place a ruler in the middle of the piece of paper and parallel to the edge of the paper closest to you so that the "1" marked on the ruler is in front of you and the "12" marked on the ruler is on your right. Put your pencil against the side of the ruler where the ruler is marked "1." Draw a line along the ruler with your pencil until you reach the number you have calculated. For example, you draw a line along the ruler until you reach the number "6" marked on the ruler.
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Remove the ruler. Place a protractor on the piece of paper. Align the protractor so that the straight ruled line along the bottom of the protractor covers the line you have drawn with the pencil.
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Slide the protractor to the left along the line you have drawn until the left end of the line appears in or under the hole or small dot in the middle of the ruled line along the bottom of the protractor. Be certain the line you have drawn is still covered by the ruled line of the protractor.
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Decide what the degree measurement of your angle will be. For example, you decide your angle will be 170 degrees.
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Beginning on the right side of the protractor, follow the curved rule with your eye until you reach the number on the curved rule that is the same as the degree measurement you have decided on for your angle. If your degree measurement is less than 90, stop at the correct degree measurement to the right of the "90" marked on the protractor. If your degree measurement is greater than 90, stop at the correct degree measurement to the left of the "90" marked on the protractor.
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Place a dot with your pencil next to the top curve of the protractor opposite the point marked with the angle measurement you have decided on. For example, you place your dot opposite the "170" marked to the left of "90" on the curved rule of the protractor.
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Remove the protractor. Place your ruler so that the side of the ruler marked "1" is next to the point that was in or under the hole or small dot in the middle of the ruled line along the bottom of the protractor.
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Rotate the ruler until the side of the ruler is next to the point you marked on the curved rule of the protractor. Make sure the end of the line opposite the side of the ruler marked "1" is still in position opposite the "1."
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Place your pencil on the point opposite the side of the ruler marked "1."
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Draw your pencil along the ruler until you reach the number on the ruler you drew the first side of the angle to. For example, you draw your pencil along the ruler until you reach the "6" marked on the ruler.
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References
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