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How to draw an equilateral pentagon with one right angle

Updated April 17, 2017

A pentagon is a five-sided, closed shape. All of the lines are straight and equal in length. A ruler is an invaluable tool to use as you attempt to accurately draw the shape. By drawing the baseline at the bottom of the shape perfectly perpendicular to a side line, you can create a perfect, 90-degree right angle.

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  1. Draw a 2.5 cm (1 inch) horizontal line. This will be the bottom base of the shape.

  2. Draw a 2.5 cm (1 inch) vertical line straight up from the left endpoint of the baseline. These two lines form the right angle. Draw a small curve in the corner of the lines if you need to denote the right angle.

  3. Draw a 2.5 cm (1 inch) line up from the right endpoint of the baseline.

  4. Measure the halfway point -- 1.25 cm (1/2 inch) -- on the baseline. Mark it lightly. Sketch a 5 cm (2 inch) vertical line up from the midpoint. This line will serve as a guide line, which you will erase when you have completed the shape.

  5. Draw a 2.5 cm (1 inch) diagonal line from the endpoint of the left side line. The diagonal line should end exactly on the vertical guide line.

  6. Draw a 2.5 cm (1 inch) diagonal line from the endpoint of the right side line. This diagonal line also should end exactly on the vertical guide line. The two diagonal lines together should form a peak.

  7. Erase the vertical guideline.

  8. Draw one short dash across each of the five lines to denote that they are equal in length, and that the pentagon is therefore equilateral.

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Things You'll Need

  • Paper
  • Pencil
  • Ruler

About the Author

Grace Riley has been a writer and photographer since 2005, with work appearing in magazines and newspapers such as the "Arkansas Democrat-Gazette." She has also worked as a school teacher and in public relations and polling analysis for political campaigns. Riley holds Bachelor of Arts degrees in American studies, political science and history, all from the University of Arkansas.

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