A square or rectangle has all right angles. More complex shapes can also have all right angles, notably forms such as the outline "cross" (e.g. Red Cross) which is an irregular
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The right triangle is defined as having one angle that is
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An angle is defined by its number of degrees in geometry. One full circle is equivalent to 360 degrees. An acute angle is an angle that is less than 90 degrees. A right angle, however
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A square or a rectangle.
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