Решение:
Угол:
α° = arccos(
)
= arccos(
60002+65432-36002
2·6000·6543
)
= arccos(
36000000+42810849-12960000
78516000
)
= 33°
Периметр:
P = a + b + c
= 3600 + 6000 + 6543
= 16143
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√8071.5·(8071.5-3600)·(8071.5-6000)·(8071.5-6543)
=√8071.5 · 4471.5 · 2071.5 · 1528.5
=√1.142767463737E+14
= 10690030
hb =
=
= 3563.3
hc =
=
= 3267.6
Угол:
β° = arcsin(
sin(α°))
= arcsin(
sin(33°))
= arcsin(1.667·0.5446)
= 65.21°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(33°))
= arcsin(1.818·0.5446)
= 81.92°