bisector

[bahy-sek-ter, bahy-sek-]

noun

Geometry.

1. a line or plane that bisects an angle or line segment.

bisector

/ baɪˈsɛktə /

noun

1. a straight line or plane that bisects an angle

2. a line or plane that bisects another line

Word History and Origins

Origin of bisector¹

First recorded in 1860–65; bisect + -or ²

Example Sentences

Some of these terms, such as magnitudes, curve line, broken line, curvilinear figure, bisector, adjacent angles, reflex angles, oblique angles and lines, and vertical angles, need merely a word of explanation so that they may be used intelligently.

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The bisector of an angle of a triangle divides the opposite side into segments which are proportional to the adjacent sides.

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The proposition relating to the bisector of an exterior angle may be considered as a part of this one, but it is usually treated separately in order that the proof shall appear less involved, although the two are discussed together at this time.

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This proposition enables us to compute the length of a bisector of a triangle if the lengths of the sides are known.

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Thus, to locate an electric light at a point eighteen feet from the point of intersection of two streets and equidistant from them, evidently one locus is a circle with a radius eighteen feet and the center at the vertex of the angle made by the streets, and the other locus is the bisector of the angle.

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