Daca unghiul are 125 grade 35 minute si 48 secunde, suplementul va fi 180-125 grade 35 min 48 sec. Pt a aefectua scaderea transformam un grad in minute apoi un minut in secunde=> S=179 grdae 59 minute 60 secunde-125 grade35 minute 48 secunde=54 grade 24 minute 12 secunde