Решение:
Угол:
α° = arccos(
)
= arccos(
)
= arccos(
)
= 46.57°
Периметр:
P = a + b + c
= 1.6 + 2.2 + 1.6
= 5.4
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√2.7·(2.7-1.6)·(2.7-2.2)·(2.7-1.6)
=√2.7 · 1.1 · 0.5 · 1.1
=√1.6335
= 1.278
hb =
=
= 1.162
hc =
=
= 1.598
Угол:
β° = arcsin(
sin(α°))
= arcsin(
sin(46.57°))
= arcsin(1.375·0.7262)
= 86.89°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(46.57°))
= arcsin(1·0.7262)
= 46.57°