right angle
an angle that measures 90 degrees
In geometry, a right angle is an angle that measures exactly 90 degrees. It is composed of two perpendicular lines or line segments. When two lines or line segments intersect at a 90-degree angle, they form a right angle.
Right angles are important in geometry, as they are used to construct perpendicular lines and to express geometric relationships. They are commonly found in shapes such as squares, rectangles, and triangles, where they form the corners of the shapes.
Right angles can also be used to calculate and measure values in geometry. For example, if two lines intersect at a right angle, the length of one line can be used to calculate the length of the other line segment using the Pythagorean theorem. Additionally, right angles are used in trigonometry to calculate the values of sine, cosine, and tangent functions.
Overall, right angles are a fundamental concept in geometry and can be used to construct and calculate various geometric shapes and values.
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