Angle Bisectors

IMPORTANT

Angle Bisectors: Overview

This topic covers concepts, such as, Bisectors of the Angles between Two Lines, Equation of Bisector between Two Lines, To Discriminate between Acute and Obtuse Angle Bisector & Bisector of the Angle between Two Lines Containing a Given Point etc.

Important Questions on Angle Bisectors

EASY
IMPORTANT

Given vertices A(1, 1), B(4,-2) & C(5, 5) of a triangle, find the equation of the perpendicular dropped from C to the interior bisector of the angle A.

EASY
IMPORTANT

Equation of angle bisector between the lines 3x+4y-7=0 and 12x+5y+17=0 are

MEDIUM
IMPORTANT

If x cos α+y sin α-p=0, x cos α'+y sin α'-p'=0 are two intersecting straight lines, then show that the equations of the bisectors of the angles between the lines are:

x(cos α+cos α)+y(sin α+sin α)-(p+p)=0 and xcos α-cos α'+ysin α-sin α'-p-p'=0.

HARD
IMPORTANT

The internal and external bisectors of the angles between two lines y=3x+3 and 3y=x+33 meet x-axis and y-axis at A and B respectively. Find the length of the line segment AB.

HARD
IMPORTANT

Find the equations of the internal bisectors of the angles of the triangle formed by the straight line 3x-4y+12=0 and the axes of co-ordinates. Then verify that the internal bisectors of a triangle are concurrent

EASY
IMPORTANT

The vertices of a triangle are A(1,7), B(-5,-1) and C(-1,2) . Then, the equation of the bisector of the ABC is

MEDIUM
IMPORTANT

If the pairs of straight lines x2-2pxy-y2=0 and x2-2qxy-y2=0 bisect the angles between each other, then which of the following is correct?

HARD
IMPORTANT

If Ax1,y1, Bx2,y2, Cx3,y3 are the vertices of the triangle then find the equation of angle bisector through A, where a,b,c units are the lengths of the sides opposite to the vertices A,B,C respectively.
 

MEDIUM
IMPORTANT

The incident ray is along the line 3x-4y-3=0 and the reflected ray is along the line 24x+7y+5=0. Find the equation of mirrors.

MEDIUM
IMPORTANT

Find the equation of the bisector of the obtuse angle between the lines 3x-4y+7=0 and 12x+5y-2=0.

HARD
IMPORTANT

If  A(1,7), B(5,1) and C(1,4) are vertices of ABC, then the equation of the internal angle bisector of ABC

HARD
IMPORTANT

The equation of the angle bisector of the acute angle between the lines 3x+7=4y and 12x+5y=2 is given by

HARD
IMPORTANT

If r1-m2+mp-q=0, then find the bisector of angle between the lines represented by the equation px2-2rxy+qy2=0, (where m is slope of line y=mx)

HARD
IMPORTANT

Comprehension Question: 5 to 6

 

In a ABC given A=60o and AD is angle bisector of angle A so that BDDC=23 and AB2BD2=6 then

tan C equals

MEDIUM
IMPORTANT

The locus of the point P which is equidistant from 3x+4y+5=0 and 9x+12y+7=0 is

EASY
IMPORTANT

The equation of  bisector of the acute angle formed between the lines 4x-3y+7=0 and 3x-4y+14=0 has the equation is 

EASY
IMPORTANT

Equation of angle bisector between the lines 3x+4y-7=0 and 12x+5y+17=0 are

EASY
IMPORTANT

The equation of the bisector of the angle between the lines x+2y-11=0,  3x-6y-5=0 which contains the point ( 1,3 ) is

EASY
IMPORTANT

Equation of angle bisectors between x and y - axes are

EASY
IMPORTANT

The equation of the line which bisects the obtuse angle between the lines x-2y+4=0 and 4x-3y+2=0 , is