dik : perbandingan panjang AB:AC:BC=3:4:5jika panjang AB=30cm keliling segitiga ABC

AB:AC:BC = 3:4:5

jika AB = 30 cm

maka
AC = 4/3 x 30 = 40 cm
BC = 5/3 x 30 = 50 cm

Keliling segitiga = AB + AC + BC = 30 cm + 40 cm + 50 cm = 120 cm

AB/AC = 3/4
30/AC = 3/4
AC  = 30 × 4/3
AC = 10 × 4
AC = 40 cm

AC/BC = 4/5
40/BC = 4/5
BC = 40 × 5/4
BC = 50 cm

keliling = AB + AC + BC = 30 cm + 40 cm + 50 cm = 120 cm

maaf kalau salah... semoga bermanfaat...