Решение:
Угол:
γ° = 180 - α° - β°
= 180 - 92.2° - 78.1°
= 9.7°
Сторона:
a = c·
= 85·
= 85·
= 85·5.931
= 504.14
Сторона:
b = c·
= 85·
= 85·
= 85·5.807
= 493.6
Периметр:
P = a + b + c
= 504.14 + 493.6 + 85
= 1082.7
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√541.37·(541.37-504.14)·(541.37-493.6)·(541.37-85)
=√541.37 · 37.23 · 47.77 · 456.37
=√439399492.55253
= 20961.9
Высота :
ha =
=
= 83.16
hb =
=
= 84.93
hc =
=
= 493.22