Решение:
Угол:
γ° = 180 - α° - β°
= 180 - 50° - 30°
= 100°
Сторона:
a = c·
= 3·
= 3·
= 3·0.7778
= 2.333
Сторона:
b = c·
= 3·
= 3·
= 3·0.5077
= 1.523
Периметр:
P = a + b + c
= 2.333 + 1.523 + 3
= 6.856
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√3.428·(3.428-2.333)·(3.428-1.523)·(3.428-3)
=√3.428 · 1.095 · 1.905 · 0.428
=√3.0605091444
= 1.749
Высота :
ha =
=
= 1.499
hb =
=
= 2.297
hc =
=
= 1.166