\[\angle ADP = 43{^\circ};\ \ \angle PDO = 90{^\circ} -\]
\[прямой;\]
\[\angle CDO = 180{^\circ} - развернутый.\]
\[\angle ADC =\]
\[= \angle CDO - \angle PDO - \angle ADP =\]
\[= 180{^\circ} - 90{^\circ} - 43{^\circ} = 47{^\circ}.\]
\[Ответ:\ \angle ADC = 47{^\circ}.\]