Решение:
Угол:
α° = arccos(
)
= arccos(
)
= arccos(
)
= 147.19°
Периметр:
P = a + b + c
= 256 + 225 + 36
= 517
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√258.5·(258.5-256)·(258.5-225)·(258.5-36)
=√258.5 · 2.5 · 33.5 · 222.5
=√4816985.9375
= 2194.8
Высота :
ha =
=
= 17.15
hb =
=
= 19.51
hc =
=
= 121.93
Угол:
β° = arcsin(
sin(α°))
= arcsin(
sin(147.19°))
= arcsin(0.8789·0.5419)
= 28.44°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(147.19°))
= arcsin(0.1406·0.5419)
= 4.37°