Решение:
Сторона:
c = √a2 + b2 - 2ab·cos(γ°)
= √5002 + 5002 - 2·500·500·cos(179°)
= √250000 + 250000 - 500000·-0.9998
= √999900
= 999.95
Угол:
α° = arcsin(
sin(γ°))
= arcsin(
sin(179°))
= arcsin(0.5·0.01745)
= 0.4999°
или:
α° = arccos(
)
= arccos(
5002+999.952-5002
2·500·999.95
)
= arccos(
250000+999900.0025-250000
999950
)
= 0.573°
Угол:
β° = arcsin(
sin(γ°))
= arcsin(
sin(179°))
= arcsin(0.5·0.01745)
= 0.4999°
Периметр:
P = a + b + c
= 500 + 500 + 999.95
= 2000
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√999.98·(999.98-500)·(999.98-500)·(999.98-999.95)
=√999.98 · 499.98 · 499.98 · 0.029999999999973
=√7499250.0239929
= 2738.5
Высота :
ha =
=
= 10.95
hb =
=
= 10.95
hc =
=
= 5.477