Найдем по теореме Пифагора АС, АС^2=АБ^2+АД^2=15^2+23^2=225+529=754 АС=V754 СН^2=АН^2+АС^2=16^2+V754^2=256+754=1010 CН=V1010 БН^2=АБ^2+АН^2=15^2+16^2=225+256=481 БН=V481 ДН^2=АД^2+АН^2=23^2+16^2=529+256=785 ДН=V785