Решение:
Угол:
α° = arcsin(
sin(β°))
= arcsin(
sin(60°))
= arcsin(0.6881·0.866)
= 36.58°
или:
α° = arccos(
)
= arccos(
)
= arccos(
)
= 36.59°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(60°))
= arcsin(1.147·0.866)
= 83.36°
Периметр:
P = a + b + c
= 3 + 4.36 + 5
= 12.36
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√6.18·(6.18-3)·(6.18-4.36)·(6.18-5)
=√6.18 · 3.18 · 1.82 · 1.18
=√42.20549424
= 6.497
Высота :
ha =
=
= 4.331
hb =
=
= 2.98
hc =
=
= 2.599