Решение:
Угол:
γ° = 180 - α° - β°
= 180 - 45° - 45°
= 90°
Сторона:
a = c·
= 13·
= 13·
= 13·0.7071
= 9.192
Сторона:
b = c·
= 13·
= 13·
= 13·0.7071
= 9.192
Периметр:
P = a + b + c
= 9.192 + 9.192 + 13
= 31.38
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√15.69·(15.69-9.192)·(15.69-9.192)·(15.69-13)
=√15.69 · 6.498 · 6.498 · 2.69
=√1782.1105352244
= 42.22
Высота :
ha =
=
= 9.186
hb =
=
= 9.186
hc =
=
= 6.495