The equation of a plane intercepting lengths a, b an c with x-axis, y-axis and z-axis respectively is
x/a +y/b + z/c = 1
This plane intercepts lengths a, b, and c with x, y and z-axis respectively.
Given a plane equation, to find x-intercept, we put y =0 and z = 0. Similarly we do for other intercepts y and z.
Revision topic of
THREE DIMENSIONAL GEOMETRY