Решение:
Угол:
α° = arccos(
)
= arccos(
4.4722+4.4722-42
2·4.472·4.472
)
= arccos(
)
= 53.13°
Периметр:
P = a + b + c
= 4 + 4.472 + 4.472
= 12.94
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√6.472·(6.472-4)·(6.472-4.472)·(6.472-4.472)
=√6.472 · 2.472 · 2 · 2
=√63.995136
= 8
Высота :
ha =
=
= 4
hb =
=
= 3.578
hc =
=
= 3.578
Угол:
β° = arcsin(
sin(α°))
= arcsin(
sin(53.13°))
= arcsin(1.118·0.8)
= 63.43°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(53.13°))
= arcsin(1.118·0.8)
= 63.43°