The fourth vertex of the parallelogram whose consecutive vertices are (2,4,-1), (3,6,-1),(4,5,1) is
A. (3,3,1)
B. (4,-2,-4)
C. (2,2/3,2)
D. (5,0,1)
The locus of a point P such that PA+PB=4 where A=(2,3,4) ,B=(-2,3,4) is
A. y2+z2+6y+8z+25=0
B. y2-z2+6y+8z-25=0
C. y2+z2-6y-8z+25=0
D. y2+z2-6y-8z-25=0
If the orthocenter and the circumcentre of a triangle are (-3,5,2), (6,2,5) then its centroid is
A. (3,3,4)
B. (3/2,7/2,7/2)
C. (-9/2,7/2,-3/2)
D. (9/2, -3/2,3/2)
The ends of the hypotenuse of a right angled triangle are (2,0,-3), (0,4,1) then the locus of the third vertex is
A. x2+y2+z2-2x-4y+2z-3=0
B. x2+y2+z2+2x+4y+2z+3=0
C. x2-y2-z2-2x-4y+2z-3=0
D. x2+y2-z2+2x+4y+2z-3=0
The line joining the points (2,3,4) and (4,10,7) intersects the line joining(2,-1,5) and (4, -30,17). Then the coordinates of the point of intersection are
A. (6/4, -8/9,33/9)
B. (16/9, 20/9, 33/9)
C. (16/4,38/9, 13/9)
D. (0,2,3)
The circumradius of the triangle formed by the points (2,-1,1) , (1,-3,-5), (3,-4,-4) is
A. 1/2√6
B. 1/2√35
C. 1/2√41
D. √41
The orthocentre of the triangle formed by the points(2,-1,1), (1,-3,-5), (3,-4,-4) is
A. (2,-1,1)
B. (1,-3,-5)
C. (3,-4,-4)
D. (2,-8/3,-8/3)
The points of trisection of the line segment joining (2,-3,5), (3,1,-2) are
A. (8/3, -1/3, 1/3), (7/3, -5/3,8/3)
B. (7/3,4,13/3) ,(8/3,3,14/3)
C. (-8/3, -1/3,1/3), (7/3,-5/3,8/3)
D. (-7/3,4, 13/3), (8/3,3,14/3)
If the origin is the centroid of the tetrahedron for which (2,-1,3), (-1,3,1), (3,4,-2) are three vertices then the fourth vertex is
A. (4,6,2)
B. (-4,-6,-2)
C. (-4,6,-2)
D. (4,-6,2)
The locus of a point which is at a distance of 5 unit from (2,1,-3) is
A. x2+y2+z2+2x+4z+5=0
B. x2+y2+z2+2x-4z-20=0
C. x2+y2+z2-2x-4z+5=0
D. x2+y2+z2-4x-2y+6z-11=0
The distance between the circumcentre and the orthocenter of the triangle formed by the points (2,1,5), (3,2,3), (4,0,4) is
A. √6
B. 1/2√6
C. 3
D. 0
The fourth vertex of the square whose consecutive vertices are (4,5,1), (2,4,-1), (3,6,-3) is
A. (-4,2,4)
B. (4,-2,-4)
C. (5,7,-1)
D. (5,0,1)
The locus of a point which is equidistant from the points(-2,2,3), (3,4,5) is
A. 10x+4y+4z-33=0
B. 10x-5y+2z=0
C. 10x-5y-2z=0
D. 10x+5y-2z=0
The orthocentre of the triangle formed by the points(2,1,5), (3,2,3), (4,0,4) is
A. (2,1,5
B. (3,2,3)
C. (4,0,4)
D. (3,1,4)
If (2,1,1) is the centroid of the triangle for which (3,2,-1), (2,-2,5) are two vertices then the third vertex is
A. (1,2,9)
B. (10,4,-9)
C. (1,-5,-2)
D. (1,3,-1)
If the orthocenter and the circumcentre of a triangle are (-3,5,1), (3,3,-1) then the circumcentre is
A. (6,2,-2)
B. (0,2,0)
C. (6,-2,-2)
D. (-6,2,2)
If (2,3,4) is the centroid of the tetrahedron for which (2,3,-1), (3,0,-2), (-1,4,3) are three vertices then the fourth vertex is
A. (4,5,16)
B. (3,2,4)
C. (2,3,4)
D. (2,2,12)
The centroid of the triangle formed by the points (2,3,-1), (5,6,3),(2,-3,1) is
A. (2,-1,3)
B. (-2,1,3)
C. (2,1,-3)
D. (3,2,1)
The locus of a point P such that the distances from P to the points (2,3,5) ,( 1,2,-1) are in the ratio 5:2 is
A. 21x2+21y2+21z2-34x-76y+90z-2=0
B. 21x2-21y2+21z2-34x-76y+90z-2=0
C. 21x2+21y2+21z2-34x+76y+90z+2=0
D. 21x2-21y2-21z2-34x-76y+90z-2=0
The locus of the point if the join of the points (-4,2,3), (2,-1,5) subtends a right angle at P is
A. x2+y2-z2+2x-y-8z+5=0
B. x2+y2-z2+2x-y-8z-5=0
C. x2+y2+z2+2x-y-8z+5=0
D. x2-y2-z2+2x-y-8z-5=0
The centroid of the tetrahedron formed by the points(3,2,5), (-3,8,-5), (-3,2,1),(-1,4,-3) is
A. (0,-1,5/2)
B. (5/4,3/4,7/4)
C. (-1,4,-1/2)
D. (5,-1,0)
In ABC where A(4,5,6), B(3,2,1), C(5,4,3), if p,q,r are lengths of the medians through A,B,C then ascending order of p,q,r is
A. p,q,r
B. q,p,r
C. r,p,q
D. r,q,p
A plane passes through (2, 3, -1) and is perpendicular to the line having direction ratios ( 3, -4, 7). The perpendicular distance from the origin to this plane is
A. 13/√74
B. 3/√74
C. 5/√74
D. 6/√74
The ratio in which (5,4,-6) divides the line segment joining (3,2,-4),(9,8,-10) is
A. 2:1
B. 1:2
C. 2:3
D. 3:2
The circumcentre of the triangle formed by the points(1,2,3), (3,-1,5), (4,0,-3) is
A. (2,1/2,4)
B. (7/2,-1/2,1)
C. (5/2,1,0)
D. (8/3,1/3,5/3)
The coplanar points(3,2,1), (5,6,5),(2,1,2),(0,-3,-2) form a
A. square
B. rectangle
C. rhombus
D. parallelogram
If the centroid of the triangle formed by (a,1,3), (-2,b,-5) and (4,7,c) is the origin then(a,b,c)=
A. (2,8,2)
B. (2,8,-2)
C. (-2,-8,2)
D. (2,-8,2)
The ratio in which yz-plane divides the line segment joining (3,4,5) ,(2,-3,1) is
A. 1:2
B. 2:1
C. 1:3
D. 3:-2
The point dividing the join of (3, -2, 1} and (-2, 3, 11) in the ratio 2 : 3 is :
A. (1, 1, 4)
B. (1, 0, 5)
C. (2, 3, 5)
D. (0, 6, -1)