Решение:
Угол:
γ° = 180 - α° - β°
= 180 - 45° - 45°
= 90°
Высота :
hc = a·sin(β°)
= 1900·sin(45°)
= 1900·0.7071
= 1343.5
Сторона:
c = √a2 + b2 - 2ab·cos(γ°)
= √19002 + 19002 - 2·1900·1900·cos(90°)
= √3610000 + 3610000 - 7220000·0
= √7220000
= 2687
или:
c = a·
= 1900·
= 1900·
= 1900·1.414
= 2686.6
или:
c = b·
= 1900·
= 1900·
= 1900·1.414
= 2686.6
Периметр:
P = a + b + c
= 1900 + 1900 + 2686.6
= 6486.6
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√3243.3·(3243.3-1900)·(3243.3-1900)·(3243.3-2686.6)
=√3243.3 · 1343.3 · 1343.3 · 556.7
=√3258024702855.1
= 1805000
hb =
=
= 1900