Решение:
Угол:
α° = arccos(
)
= arccos(
)
= arccos(
2304+2641.96-338.56
4934.4
)
= 20.98°
Периметр:
P = a + b + c
= 18.4 + 48 + 51.4
= 117.8
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√58.9·(58.9-18.4)·(58.9-48)·(58.9-51.4)
=√58.9 · 40.5 · 10.9 · 7.5
=√195010.5375
= 441.6
Высота :
ha =
=
= 48
hb =
=
= 18.4
hc =
=
= 17.18
Угол:
β° = arcsin(
sin(α°))
= arcsin(
sin(20.98°))
= arcsin(2.609·0.358)
= 69.07°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(20.98°))
= arcsin(2.793·0.358)
= 89.17°