# Right angle, Angle

In geometry and trigonometry, a right angle, latin *angulus rectus* where rectus means "upright", is an angle that bisects the angle formed by two halves of a straight line. More precisely, if a ray is placed so that its endpoint is on a line and the adjacent angles are equal, then they are right angles.

Closely related and important geometrical concepts are perpendicular lines, meaning lines that form right angles at their point of intersection, and orthogonality, which is the property of forming right angles, usually applied to vectors. The presence of a right angle in a triangle is the defining factor for right triangles.Read more

Right angle = 1/4 full circle = π/2 rad = 100 gon = 90°

List of all Right angle to other angle units individual converters.### Common units

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