Решение:
Сторона:
a = √b2 + c2 - 2bc·cos(α°)
= √32 + 32 - 2·3·3·cos(40°)
= √9 + 9 - 18·0.766
= √4.212
= 2.052
Угол:
β° = arcsin(
sin(α°))
= arcsin(
sin(40°))
= arcsin(1.462·0.6428)
= 70.01°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(40°))
= arcsin(1.462·0.6428)
= 70.01°
Периметр:
P = a + b + c
= 2.052 + 3 + 3
= 8.052
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√4.026·(4.026-2.052)·(4.026-3)·(4.026-3)
=√4.026 · 1.974 · 1.026 · 1.026
=√8.365957239024
= 2.892
Высота :
ha =
=
= 2.819
hb =
=
= 1.928
hc =
=
= 1.928