Решение:
Угол:
α° = arccos(
)
= arccos(
53.6656312+64.6219782-49.4772682
2·53.665631·64.621978
)
= arccos(
2879.9999506282+4176.0000406325-2448.0000487438
6936
)
= 48.37°
Периметр:
P = a + b + c
= 49.477268 + 53.665631 + 64.621978
= 167.76
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√83.88·(83.88-49.477268)·(83.88-53.665631)·(83.88-64.621978)
=√83.88 · 34.402732 · 30.214369 · 19.258022
=√1679099.9990679
= 1295.8
Высота :
ha =
=
= 52.38
hb =
=
= 48.29
hc =
=
= 40.1
Угол:
β° = arcsin(
sin(α°))
= arcsin(
sin(48.37°))
= arcsin(1.085·0.7475)
= 54.2°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(48.37°))
= arcsin(1.306·0.7475)
= 77.48°