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Right angle

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Right Angles

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Right Angles

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How To Make A Perfect Right Angle [3-4-5 Method]

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Right Angles | Simulate a Real-World Experience

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Right angles in a shape

In geometry and trigonometry, a right angle is an angle of exactly 90° (degrees), corresponding to a quarter turn. If a ray is placed so that its endpoint is on a line and the adjacent angles are equal, then they are right angles. The term is a calque of Latin angulus rectus; here rectus means "upright", referring to the vertical perpendicular to a horizontal base line.
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