Решение:
Угол:
γ° = 180 - α° - β°
= 180 - 60° - 60°
= 60°
Сторона:
a = c·
= 5·
= 5·
= 5·1
= 5
Сторона:
b = c·
= 5·
= 5·
= 5·1
= 5
Периметр:
P = a + b + c
= 5 + 5 + 5
= 15
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√7.5·(7.5-5)·(7.5-5)·(7.5-5)
=√7.5 · 2.5 · 2.5 · 2.5
=√117.1875
= 10.83
hb =
=
= 4.332
hc =
=
= 4.332