Răspuns:
Explicație pas cu pas:
16.
x + complementul lui = 90°
a)
90° - 40° = 50°
b)
90° - 35° = 55°
c)
90° - 81° = 9°
d)
90° - 23°37' = 89°60' - 23°37' = 66°23'
e)
90° - 55°38' = 89°60' - 55°38' = 34°22'
f)
90° - 34°26'43'' = 89°59'60'' - 34°26'43'' = 55°33'17''
17.
x + suplementul lui = 180°
180° - 110° = 70°
180° - 90° = 90°
180° - 103°57' = 179°60' - 103°57' = 76°3'
180° - 145°25'37'' = 179°59'60'' - 145°25'37'' = 34°34'23''
180° - 160°40'12'' = 179°59'60'' - 160°40'12'' = 19°19''48''
20.
180° - y = y + 50°
180° - 50° = y + y
130° = 2y
y = 130° : 2 = 65°
21.
68°38' : 2 = 34°19'
102° : 2 = 51°
83°50' : 2 = 82°110' : 2 = 41°55'