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Draw a line of any length. Set the protractor at one end of this line and draw an angle of 60 degrees - measuring angles from the other end of the line. Move the protractor to the other end of the original line and repeat.

If necessary extend the lines of the angle until they meet. The three lines will form a regular (equilateral) triangle.

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14y ago

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Q: How can you build a regular triangle using the protractor?
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