Решение:
Угол:
α° = arccos(
)
= arccos(
)
= arccos(
)
= 63.9°
Периметр:
P = a + b + c
= 180 + 200 + 100
= 480
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√240·(240-180)·(240-200)·(240-100)
=√240 · 60 · 40 · 140
=√80640000
= 8980
Высота :
ha =
=
= 99.78
hb =
=
= 89.8
hc =
=
= 179.6
Угол:
β° = arcsin(
sin(α°))
= arcsin(
sin(63.9°))
= arcsin(1.111·0.898)
= 86.09°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(63.9°))
= arcsin(0.5556·0.898)
= 29.93°