  In this paper, we introduce the notion of a total polar for an arbitrary
subspace of a Cayley-Klein space in an analytical framework. We show that the
set of all total polars of a subspace is a Schubert variety. The notion of
total polar gives a definition for a subspace to be tangent to the absolute
figure of the space. By specifying tangent lines, tangent cones and then
spheres are defined. This definition of the sphere does not depend on the
metric of the space. It is proved that every reflection of a Cayley- Klein
space, defined by two subspaces which are total polar to each other, is a
motion of the space. On the other hand, each motion in a Cayley-Klein space of
dimension n is a product of at most n+1 reflections in point-hyperplane pairs.
