Penjelasan dengan langkah-langkah:
CF/CB = EF/AB
CF/(CF+4) = 5/7
CF × 7 = 5 × (CF+4)
7CF = 5CF + 20
7CF - 5CF = 20
2CF = 20
CF = 20/2
CF = 10 cm
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Penjelasan dengan langkah-langkah:
CF/CB = EF/AB
CF/(CF+4) = 5/7
CF × 7 = 5 × (CF+4)
7CF = 5CF + 20
7CF - 5CF = 20
2CF = 20
CF = 20/2
CF = 10 cm