Решение:
Угол:
γ° = 180 - α° - β°
= 180 - 45° - 45°
= 90°
Сторона:
a = c·
= 7·
= 7·
= 7·0.7071
= 4.95
Сторона:
b = c·
= 7·
= 7·
= 7·0.7071
= 4.95
Периметр:
P = a + b + c
= 4.95 + 4.95 + 7
= 16.9
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√8.45·(8.45-4.95)·(8.45-4.95)·(8.45-7)
=√8.45 · 3.5 · 3.5 · 1.45
=√150.093125
= 12.25
hb =
=
= 4.949
hc =
=
= 3.5