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Definition of right angle for Students. : an angle formed by two lines that are perpendicular to each other : an angle of 90 degrees.
Right Angle Symbol: Label the Right Angle. Label the right angle, not the wrong one! A right angle is an angle that's exactly 90 degrees. Teach your child more about these angles and their symbols on this geometry worksheet. She'll need to label all the right angles with the right angle symbol.