Решение:
Угол:
α° = arccos(
)
= arccos(
)
= arccos(
)
= 68.32°
Периметр:
P = a + b + c
= 7.5 + 7 + 6.32
= 20.82
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√10.41·(10.41-7.5)·(10.41-7)·(10.41-6.32)
=√10.41 · 2.91 · 3.41 · 4.09
=√422.49483639
= 20.55
Высота :
ha =
=
= 5.48
hb =
=
= 5.871
hc =
=
= 6.503
Угол:
β° = arcsin(
sin(α°))
= arcsin(
sin(68.32°))
= arcsin(0.9333·0.9293)
= 60.15°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(68.32°))
= arcsin(0.8427·0.9293)
= 51.55°