Решение:
Сторона:
b = √a2 + c2 - 2ac·cos(β°)
= √42 + 5.12 - 2·4·5.1·cos(14°)
= √16 + 26.01 - 40.8·0.9703
= √2.422
= 1.556
или:
b = a·
= 4·
= 4·
= 4·0.3421
= 1.368
или:
b = c·
= 5.1·
= 5.1·
= 5.1·0.2822
= 1.439
Высота :
hc = a·sin(β°)
= 4·sin(14°)
= 4·0.2419
= 0.9676
Периметр:
P = a + b + c
= 4 + 1.439 + 5.1
= 10.54
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√5.27·(5.27-4)·(5.27-1.439)·(5.27-5.1)
=√5.27 · 1.27 · 3.831 · 0.17
=√4.358884983
= 2.088
Высота :
ha =
=
= 1.044
hb =
=
= 2.902