right angle
an angle that is exactly 90 degrees
A right angle is a geometric term that describes an angle that measures exactly 90 degrees. It is formed when two straight lines intersect each other at a point and create two adjacent angles. One of the angles measures 90 degrees and is called the right angle. It is represented by a small square drawn at the vertex where the lines intersect. Right angles are important in mathematics and geometry because they are used in many calculations, such as finding the area and perimeter of a rectangle or determining the relationships between different parts of a triangle.
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