A right angle is formed when two lines form a vertex that measures 90 degrees. To verify the measurement of any angle, a tool called a protractor needs to be used. Rectangles and squares are composed of 4 right angles, and therefore the corner of a perfect square is an example of a correct right angle.

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what does a right angle look like

A right angle, or 90 degrees, looks like half a square. Basically a vertical line with a horizontal line. A right angle is useful because it helps us to easy add up the total degrees of a shape.

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