[tex]|\angle C|=180^\circ-2*75^\circ=180^\circ-150^\circ=30^\circ\\|\angle D|=|\angle E|=(180^\circ-100^\circ):2=80^\circ:2=40^\circ\\|\angle I|=180^\circ-2*65^\circ=180^\circ-130^\circ=50^\circ\\|\angle J|=|\angle K|=|\angle L|=180^\circ:3=60^\circ\\|\angle N|=|\angle O|=(180^\circ-90^\circ):2=90^\circ:2=45^\circ\\|\angle P|=70^\circ\\|\angle R|=180^\circ-2*70^\circ=180^\circ-140^\circ=40^\circ[/tex]