How to draw a 90 degree angle (right angle) at a point on a line

Learn how to draw a 90 degree angle at a point on a line using a compass and ruler. Put your compass point on the point where you want to make the angle, and

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Rotating shapes about the origin by multiples of 90° (article)

Construct angle ABC = 90^{circ}. Draw BP. the bisector of angle ABC. Then the measure of angle PBC.

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Right angle - Wikipedia

Right Angle – Definition with Examples

Right Angles, Definition and Examples

How to draw a 90 degree angle (right angle) at a point on a line without a protractor.