Решение:
Угол:
α° = arccos(
)
= arccos(
)
= arccos(
)
= 57.91°
Периметр:
P = a + b + c
= 7 + 8 + 6
= 21
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√10.5·(10.5-7)·(10.5-8)·(10.5-6)
=√10.5 · 3.5 · 2.5 · 4.5
=√413.4375
= 20.33
Высота :
ha =
=
= 5.809
hb =
=
= 5.083
hc =
=
= 6.777
Угол:
β° = arcsin(
sin(α°))
= arcsin(
sin(57.91°))
= arcsin(1.143·0.8472)
= 75.55°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(57.91°))
= arcsin(0.8571·0.8472)
= 46.56°