Решение:
Угол:
γ° = 180 - α° - β°
= 180 - 60° - 60°
= 60°
Сторона:
a = c·
= 12.77·
= 12.77·
= 12.77·1
= 12.77
Сторона:
b = c·
= 12.77·
= 12.77·
= 12.77·1
= 12.77
Периметр:
P = a + b + c
= 12.77 + 12.77 + 12.77
= 38.31
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√19.16·(19.16-12.77)·(19.16-12.77)·(19.16-12.77)
=√19.16 · 6.39 · 6.39 · 6.39
=√4999.17200004
= 70.7
Высота :
ha =
=
= 11.07
hb =
=
= 11.07
hc =
=
= 11.07