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Kelas : IX SMP
Bab : Kesebangunan dan Kekongruenan
Pembahasan :
(40 - 3 - x)/40 = (50 - 5 - 5)/50
(37 - x)/40 = 40/50
(37 - x)/40 = 4/5
5(37 - x) = 160
37 - x = 32
x = 37 - 32
x = 5 cm ——» Lebar karton bagian bawah
Perbandingan...
Luas Foto : Luas Karton
40.32 : 50.40
32 : 50
16 : 25