Решение:
Угол:
γ° = 180 - α° - β°
= 180 - 25° - 125°
= 30°
Сторона:
a = c·
= 70·
= 70·
= 70·0.8452
= 59.16
Сторона:
b = c·
= 70·
= 70·
= 70·1.638
= 114.66
Периметр:
P = a + b + c
= 59.16 + 114.66 + 70
= 243.82
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√121.91·(121.91-59.16)·(121.91-114.66)·(121.91-70)
=√121.91 · 62.75 · 7.25 · 51.91
=√2879002.8637437
= 1696.8
Высота :
ha =
=
= 57.36
hb =
=
= 29.6
hc =
=
= 48.48