Решение:
Угол:
α° = arccos(
)
= arccos(
)
= arccos(
)
= 88.41°
Периметр:
P = a + b + c
= 16 + 15 + 6
= 37
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√18.5·(18.5-16)·(18.5-15)·(18.5-6)
=√18.5 · 2.5 · 3.5 · 12.5
=√2023.4375
= 44.98
Высота :
ha =
=
= 5.623
hb =
=
= 5.997
hc =
=
= 14.99
Угол:
β° = arcsin(
sin(α°))
= arcsin(
sin(88.41°))
= arcsin(0.9375·0.9996)
= 69.57°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(88.41°))
= arcsin(0.375·0.9996)
= 22.02°