1.
The point of intersection of the lines  is
2.
If the position vectors of the points and are and respectively, then the equation of the plane through and perpendicular to is
3.
The point equidistant from the point (), ad (0, 0, 0) is
4.
If a plane meets the coordinate axes at and such that the centroid of the triangle is (1,2,4), then the equation of the plane is
5.
If the coordinates of the vertices of a are and , then is equal to
6.
The distance between the line  and the plane  is
7.
A point on - plane divides the join of and at
8.
A plane makes intercepts upon the coordinate axes. Then, the length of the perpendicular from the origin on it is
9.
The equation of the plane counting the lines
10.
The equation of the plane which bisects the line joining (2, 3,4 ) and (6, 7, 8), is