Line and a Point

IMPORTANT

Line and a Point: Overview

This topic covers concepts, such as, A Line and a Point in 3D, Distance of a Point from a Line in 3D, Foot of Perpendicular from a Point to a Line in 3D & Image of a Point in a Line in 3D etc.

Important Questions on Line and a Point

HARD
IMPORTANT

The coordinates of the image of the point (1, 3, 4) in the plane   2xy+z+3=0. is:

MEDIUM
IMPORTANT

The reflection of the point A1,0,0 in the line x-12=y+1-3=-z+108 is

MEDIUM
IMPORTANT

The length of the perpendicular from the point 1,2,3 to the line -x+6-3=y-72=z-7-2 is _________.

MEDIUM
IMPORTANT

The perpendicular distance of the point P(2, 1, 3) from the line x-13=y-31=z-4-5 is

MEDIUM
IMPORTANT

The coordinate of a point on the line x-21=y+1-1=z3 at a distance 21 from the point -1, -1, 1 is -

HARD
IMPORTANT

The length of the perpendicular from A(2,-3,1) on the linex+12=y-33=z+2-1 is

MEDIUM
IMPORTANT

Length of the perpendicular from the point 5,4,-1 to the line r=i^+λ(2i^+9j^+5k^) is

EASY
IMPORTANT

The image of the point (1, 6, 3) in the line r=j^+2k^+λi^+2j^+3k^ is

HARD
IMPORTANT

Find two points on the line x-21=y+3-2=z+32 which are on either side of 2,-3,-3 at a distance of 3 units from it.

MEDIUM
IMPORTANT

Find the length of the perpendicular from the point 5,4,-1 to the line r¯=i^+λ(2i^+9j^+5k^).

HARD
IMPORTANT

Find the foot of the perpendicular from the point (0,2,3) on the line x+35=y-12=z+43.Also, find the length of the perpendicular.

HARD
IMPORTANT

The perpendicular distance of the line x-42=y1=z-2-1 from the point P(1, 1, 3) is equal to

MEDIUM
IMPORTANT

The coordinates of the foot of perpendicular from the point 1,0,0 to the line x-12=y+1-3=z+108 are

HARD
IMPORTANT

The perpendicular distance of point P(0,-1,3) from the straight line passing through A(1,-3,2) and B(2,-1,4) is

HARD
IMPORTANT

Let x + y - z  4 = 0 be the equation of a plane and A be a point (1, 2, 3). If line L passes through (1, 2, 3) with direction ratios 3 : 1 : 4. If distance of A from line measured parallel to the plane is d1 and if distance of the plane measured parallel to line is d2 then d12-d22 is 

HARD
IMPORTANT

The length of the perpendicular from 1,0,2 on the line x+13=y-2-2=z+1-1 is

HARD
IMPORTANT

Find the foot of perpendicular from the point 2,3,4 to the line 4-x2=y6=1-z3. Also find the perpendicular distance of the line from the point.

HARD
IMPORTANT

The equation of a line in the plane given by π2xy+z4=0 which is perpendicular to the line l whose equation is given by x21=y21=z32 and which passes through the point of intersection of l and π is equal to:

EASY
IMPORTANT

The image of the point 1,6,3 in the line represented by r=j^+2k^+λi^+2j^+3k^ is :

HARD
IMPORTANT

Let O be origin and point P11,1,1 lie on L1:x=y=z. Projection of OP1 on x-axis be OM1 . Projection of OM1 on L1 be OP2 and so on then  P1M1+P2M2+......=______