Решение:
Сторона:
a = √b2 + c2 - 2bc·cos(α°)
= √6002 + 9602 - 2·600·960·cos(60°)
= √360000 + 921600 - 1152000·0.5
= √705600
= 840
Угол:
β° = arcsin(
sin(α°))
= arcsin(
sin(60°))
= arcsin(0.7143·0.866)
= 38.21°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(60°))
= arcsin(1.143·0.866)
= 81.82°
Периметр:
P = a + b + c
= 840 + 600 + 960
= 2400
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√1200·(1200-840)·(1200-600)·(1200-960)
=√1200 · 360 · 600 · 240
=√62208000000
= 249415.3
Высота :
ha =
=
= 593.85
hb =
=
= 831.38
hc =
=
= 519.62