The distance formula between two points A(x1,y1) and B(x2,y2) is given by
For the line segment joining the points A(x1, y1, z1) and B(x2, y2, z2)
are
The distance between the points (x1,−y1) and (−x2,y2) is ___ units.
P and Q are 2 external points from which tangents are drawn to circle centered at origin and radius 'r' P≡(x1,y1),Q≡(x2,y2). What is the condition for the lengths of tangents to be the same?