AB,CD,PQ are perpendicular to BD. AB=x. CD=y and PQ=z, prove that `1/x+1/y=1/z`.

AB, CD, PQ are perpendicular to BD. If AB = x, CD = y and PQ = z prove that (1)/(x) + (1)/(y) = (1)/(z)

In the figure, O is the centre of the circle and AB = CD. OM is perpendicular on bar(AB) and bar(ON) is perpendicular on bar(CD) . Then prove that OM = ON.

Let ABCD be a quadrilateral with area 18. with side AB parallel to the side CD and CD = 2 AB. Let AD be perpendicular to AB and CD. If a circle is drawn inside the quadrilateral ABCD touching all the sides, then its radius is

A plane passes through (1, -2, 1) and is perpendicular to two planes 2x - 2y + z=0 and x - y + 2z =4, then the distance of the plane from the point (1,2,2) is

If a, b, c are in G.P. and a^(1/x) =b^(1/y)=c^(1/z) , prove that x, y , z are in A.P

In quadrilateral ABCD, AB = BC = CD = AD and AC ne BD then it is a .....

The foot of the perpendicular from the point (1,2,3) to the line (x)/(2)=(y-1)/(3)=(z-1)/(3) is

ABCD is a trapezium. AB || CD, P, Q are the mid-points AD and BC respectively. If AB=10cm, CD=18 cm, then PQ=?

In the given figure below, If AD bot BC , prove that AB^2+ CD^2 = AC^2 + BD^2 .