Решение:
Угол:
α° = arccos(
)
= arccos(
6.372+4.452-4.622
2·6.37·4.45
)
= arccos(
40.5769+19.8025-21.3444
56.69
)
= 46.48°
Периметр:
P = a + b + c
= 4.62 + 6.37 + 4.45
= 15.44
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√7.72·(7.72-4.62)·(7.72-6.37)·(7.72-4.45)
=√7.72 · 3.1 · 1.35 · 3.27
=√105.647814
= 10.28
Высота :
ha =
=
= 4.45
hb =
=
= 3.228
hc =
=
= 4.62
Угол:
β° = arcsin(
sin(α°))
= arcsin(
sin(46.48°))
= arcsin(1.379·0.7251)
= 89.24°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(46.48°))
= arcsin(0.9632·0.7251)
= 44.3°