Решение:
Сторона:
a = √b2 + c2 - 2bc·cos(α°)
= √1002 + 1002 - 2·100·100·cos(45°)
= √10000 + 10000 - 20000·0.7071
= √5858
= 76.54
Угол:
β° = arcsin(
sin(α°))
= arcsin(
sin(45°))
= arcsin(1.307·0.7071)
= 67.54°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(45°))
= arcsin(1.307·0.7071)
= 67.54°
Периметр:
P = a + b + c
= 76.54 + 100 + 100
= 276.54
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√138.27·(138.27-76.54)·(138.27-100)·(138.27-100)
=√138.27 · 61.73 · 38.27 · 38.27
=√12500896.63727
= 3535.7
Высота :
ha =
=
= 92.39
hb =
=
= 70.71
hc =
=
= 70.71