A right angle is an angle that is exactly 90 degrees. When an angle is 90 degrees, one leg of the angle is perfectly horizontal, and the other is perfectly vertical. It is the best angle for creating stable structures. You can find more information here: http://www.mathsisfun.com/rightangle.html

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what is a right angle

right angle

NOUN

1.

the angle formed by two radii of a circle that are drawn to the extremities of an arc equal to one quarter of the circle; the angle formed by two perpendicular lines that intersect; an angle of 90°.

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A right angle is an angle that is exactly 90 degrees. A square and a rectangle are shapes made with right angles. A right triangle has one angle that is 90 degrees.

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In planar geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.
Angles...