tolong kerja bserta jalan kerjanya

DE = 3 cm
AB = 12 cm
CD = 6 cm
BD = 14 cm
BC = BD + CD = 14 + 6 = 20 cm

CE = ...?

CE/BC = DE/AB
CE/20 = 3/12
CE × 12 = 3 × 20
12CE = 60
CE = 60/12
CE = 5 cm

Jadi panjang CE = 5 cm (a)