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panjang diperbesar = 3x5 = 15
lebar diperbesar = 4x5 = 20
Luas diperbesar = 15x20 = 300 cm²
perbandingan luas:
sebelum : sesudah
12 : 300
1 : 25
bisa ukurannya, dg kalikan seperti cara diatas
bisa luasnya, namun dikalikan kuadratkan. contoh:
luas= 3x4 = 12
diperbesar = 12 x 5² = 12 x 25 = 300
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