Решение:
Угол:
α° = arccos(
)
= arccos(
53.72+64.6219782-49.52
2·53.7·64.621978
)
= arccos(
2883.69+4176.0000406325-2450.25
6940.4
)
= 48.38°
Периметр:
P = a + b + c
= 49.5 + 53.7 + 64.621978
= 167.82
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√83.91·(83.91-49.5)·(83.91-53.7)·(83.91-64.621978)
=√83.91 · 34.41 · 30.21 · 19.288022
=√1682429.2558497
= 1297.1
Высота :
ha =
=
= 52.41
hb =
=
= 48.31
hc =
=
= 40.14
Угол:
β° = arcsin(
sin(α°))
= arcsin(
sin(48.38°))
= arcsin(1.085·0.7476)
= 54.21°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(48.38°))
= arcsin(1.305·0.7476)
= 77.32°