Bonjour,
1)
BAH: aigu
GMC: obtus
2)
RTO
OKI
OIT
3)
tOz = 60°
xOz=40°
zOx=120°
yOz = 80°
4)
90 - 37 =>53°
5)
JOL = 180°
angle plat
MOL = 180 - 53 =>127°
6)
IOK = 180 - 41 - 56 =>83°
