How to Draw Perpendicular Lines in Geometry

Perpendicular lines are similar to intersecting lines, however, they intersect to form a right angle. You'll need a protractor to make sure your lines form a right angle. Once you learn this simple equation, you can continue to progress your geometry skills.

Things You'll Need

• Paper
• Pencil
• Ruler
• Protractor

Instructions

How to Draw Perpendicular Lines in Geometry

1. Take a ruler and draw a line.

2. Use your protractor to draw another line at a 90 degree angle. This is also known as a "right angle."

3. To indicate that the line is indeed a right angle, draw a box to connect the lines.

4. Place arrows on the ends of each of the lines.

5. Place dots near the ends of each side of the lines.

6. Label the dots. For example, we'll use the letters G, H, I, and J.

7. For your equation, write GH. Over the top, draw a line with two arrows on the end. Leave a space and then draw one line vertical line that connects in the middle of a horizontal line. Then, write IJ, again with a line over the top. This means GH is perpendicular to IJ.

Tips & Warnings

• In geometry, perpendicular lines may be assigned different letters.

Resources

• Math.com