tolong jawab yg bener

Penyelesaian:

Misal: x = rasio perubahan ukuran

panjang DC = 30 mm
panjang DA = 25 mm

DC = HG
DA = HE (h)

30 . x = 12
x = 12/30
x = 2/5

h = DA . x
h = 25 . 2/5
h = 10 mm