Решение:
Сторона:
a = √b2 + c2 - 2bc·cos(α°)
= √52 + 52 - 2·5·5·cos(90°)
= √25 + 25 - 50·0
= √50
= 7.071
Угол:
β° = arcsin(
sin(α°))
= arcsin(
sin(90°))
= arcsin(0.7071·1)
= 45°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(90°))
= arcsin(0.7071·1)
= 45°
Периметр:
P = a + b + c
= 7.071 + 5 + 5
= 17.07
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√8.536·(8.536-7.071)·(8.536-5)·(8.536-5)
=√8.536 · 1.465 · 3.536 · 3.536
=√156.35671727104
= 12.5
Высота :
ha =
=
= 3.536
hb =
=
= 5
hc =
=
= 5