Detailed description
Cartesian plane. Points (1, 2), (5, 10) shown. Segment drawn joining these points. Dotted segment from (1, 2) to (5, 2) labelled '5 – 1 = 4'. Dotted segment from (5, 2) to (5, 10) labelled '10 – 2 = 8'. Right angle marked at (5, 2).
