Решение:
Угол:
α° = arccos(
)
= arccos(
)
= arccos(
)
= 121.25°
Периметр:
P = a + b + c
= 36 + 25 + 16
= 77
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√38.5·(38.5-36)·(38.5-25)·(38.5-16)
=√38.5 · 2.5 · 13.5 · 22.5
=√29235.9375
= 170.99
Высота :
ha =
=
= 9.499
hb =
=
= 13.68
hc =
=
= 21.37
Угол:
β° = arcsin(
sin(α°))
= arcsin(
sin(121.25°))
= arcsin(0.6944·0.8549)
= 36.42°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(121.25°))
= arcsin(0.4444·0.8549)
= 22.33°