right angle
A right angle is a geometric term used to describe an angle that measures exactly 90 degrees
A right angle is a geometric term used to describe an angle that measures exactly 90 degrees. In other words, if you were to draw a straight line and then create a perpendicular line intersecting it, the angle formed at the point of intersection would be a right angle.
A right angle can be denoted using the symbol ‘∠’ followed by a small square at the vertex of the angle (e.g., ∠ABC). The square signifies that the angle is a right angle. The sides of a right angle are perpendicular to each other, meaning they intersect at 90 degrees and form a perfect L-shape.
Right angles are commonly encountered in various situations. In everyday life, corners of buildings, squares, rectangles, and many other objects have right angles. In geometry and trigonometry, right angles play a significant role, particularly in the Pythagorean theorem, where one of the angles in a right triangle is always 90 degrees.
The concept of right angles is fundamental in mathematics as it serves as a reference point for the measurement and comparison of other angles. It is often used as a starting point to create other angles, such as acute angles (less than 90 degrees) and obtuse angles (greater than 90 degrees).
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