perbandingan sisi sisi segitiga 3:4:2 luasnya 3 akar 15 mka kelilingnya?

sisi-sisinya
3x ; 4x ; 2x

K = 3x + 4x + 2x = 9x
S = 1/2 × 9x = 9/2 x

Luas = 3 akar15
akar(s(s-a)(s-b)(s-c)) = 3 akar15
akar(9/2 x (9/2x - 3x)(9/2x - 4x)(9/2x - 2x)) = 3 akar15
akar(9/2x × 3/2x × 1/2x × 5/2x) = 3 akar15
akar(135/8 x^3) = 3 akar15
135/8 x^3 = 9×15
135/8 x^3 = 135
x^3 = 135 × 8/135
x^3 = 8
x^3 = 2^3
x = 2

Jadi Keliling= 9x = 9×2 = 18 cm