## Detailed description

Right-angled triangle ABC, with vertices A(a, b), B(c, d) and C(a, d). The distances CA and BC are labelled with absolute value of b – d and a – c respectively.

Right-angled triangle ABC, with vertices A(a, b), B(c, d) and C(a, d). The distances CA and BC are labelled with absolute value of b – d and a – c respectively.