Решение:
Сторона:
c = √a2 + b2 - 2ab·cos(γ°)
= √422 + 222 - 2·42·22·cos(82°)
= √1764 + 484 - 1848·0.1392
= √1990.8
= 44.62
или:
c = a·
= 42·
= 42·
= 42·1.111
= 46.66
или:
c = b·
= 22·
= 22·
= 22·1.726
= 37.97
Высота :
hc = a·sin(β°)
= 42·sin(35°)
= 42·0.5736
= 24.09
Периметр:
P = a + b + c
= 42 + 22 + 37.97
= 101.97
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√50.99·(50.99-42)·(50.99-22)·(50.99-37.97)
=√50.99 · 8.99 · 28.99 · 13.02
=√173023.02606498
= 415.96
Высота :
ha =
=
= 19.81
hb =
=
= 37.81