Решение:
Угол:
α° = arccos(
)
= arccos(
3.702+3.802-3.802
2·3.70·3.80
)
= arccos(
)
= 60.87°
Периметр:
P = a + b + c
= 3.80 + 3.70 + 3.80
= 11.3
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√5.65·(5.65-3.80)·(5.65-3.70)·(5.65-3.80)
=√5.65 · 1.85 · 1.95 · 1.85
=√37.70739375
= 6.141
Высота :
ha =
=
= 3.232
hb =
=
= 3.319
hc =
=
= 3.232
Угол:
β° = arcsin(
sin(α°))
= arcsin(
sin(60.87°))
= arcsin(0.9737·0.8735)
= 58.27°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(60.87°))
= arcsin(1·0.8735)
= 60.87°