5a
m(∡MON)=20°31'
m(∡NOP)=65°15'
m(∡MOP)=20°31'+65°15'=85°46'
5b
m(∡MON)=46°29'
m(∡NOP)=52°45'
m(∡MOP)=46°29'+52°45'=98°74'=99°14'
6a
m(∡MOP)=125°8'
m(∡NOP)=15°20'
m(∡MON)=125°8'-15°20'=124°68'-15°20'=109°48'
6b
m(∡MOP)=91°21'
m(∡NOM)=36°35'
m(∡NOP)=91°21'-36°35'=90°81'-36°35'=54°46'
