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Definition Of Bisect

Bisect means to divide into two equal sections or two equal halves.

More About Bisect

If we bisect a 900 angle, we will have two 450 angles.
Definition of Bisect

The word 'bisect' combines the common Latin 'bi' for 'two', and 'secare', meaning 'to cut', which also is the root for secant
Straight edge and compass are used to bisect a line segment or an angle
Anything can be bisected: a line, an angle, a circle, a square

Video Examples: Bisect


Example of Bisect

Following steps are involved when we bisect an angle by using ruler and compass:
Example of Bisect

Draw an arc with B as the centre to cut the arms, BA and BC, of the angle at P and Q respectively
Using the same radius, draw an arc centered at P
Again, using the same radius, draw an arc centered at Q to cut the arc previously drawn at R
Join, B, the vertex of the angle, to the point R
Examples of Bisect

BR bisects the angle ABC, and is called the bisector of the angle ABC.

Solved Example on Bisect

Ques: Find the value of DC, if  bisects ?BAC.


A. 2 cm
B. 8 cm
C. 4 cm
D. 6 cm
Correct Answer: C


Solved Example on Bisect