Question

Perbandingan sisi segitiga adalah 3:4:5 jika kelilingnya 48 cm,tentukan panjang masing2 sisi segitiga
tolong tuliskan caranya

Answer 1

3:4:5 kita umpamakan saja menjadi 3x, 4x dan 5x

jadi
K = 48
a+b+c =48
3x + 4x + 5x = 48
12x = 48
x = 48/12
x = 4

jadi
sisi a = 3× = 3 × 4 = 12
b = 4× = 4 × 4 = 16
c = 5× = 5 × 4 = 20

semoga bermanfaat

Answer 2

Misal,
a = sisi 1
b = sisi 2
c = sisi 3

a/b = 3/4
4a = 3b
a = 3/4b

b/c = 4/5
4c = 5b
c = 5/4b

lalu masukan a dan c ke,
a + b + c = 48
3/4b + b + 5/4b = 48
12/4b = 48
3b = 48
b = 16

sudah dapat b, lalu cari a,
a/b = 3/4
a/16 = 3/4
a = 12

lalu cari c
a + b + c = 48
12 + 16 + c = 48
c = 18