<P> The product of the perpendicular distances from a point P on a hyperbola or on its conjugate hyperbola to the asymptotes is a constant independent of the location of P . </P> <P> A rectangular hyperbola has asymptotes that are perpendicular to each other . It has an eccentricity equal to 2 . (\ displaystyle (\ sqrt (2)).) </P> <P> The legs of a right triangle are perpendicular to each other . </P> <P> The altitudes of a triangle are perpendicular to their respective bases . The perpendicular bisectors of the sides also play a prominent role in triangle geometry . </P>

Which type of triangle must have perpendicular lines