Решение:
Угол:
α° = arccos(
)
= arccos(
)
= arccos(
)
= 96.07°
Периметр:
P = a + b + c
= 6.4 + 4.5 + 4.1
= 15
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√7.5·(7.5-6.4)·(7.5-4.5)·(7.5-4.1)
=√7.5 · 1.1 · 3 · 3.4
=√84.15
= 9.173
Высота :
ha =
=
= 2.867
hb =
=
= 4.077
hc =
=
= 4.475
Угол:
β° = arcsin(
sin(α°))
= arcsin(
sin(96.07°))
= arcsin(0.7031·0.9944)
= 44.36°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(96.07°))
= arcsin(0.6406·0.9944)
= 39.57°