24. bd/ab = de/ac
12/ab = 9/21
ab = (21×12)/9
ab = 28 cm
ad = ab-bd = 28-12 = 16 cm
25. de/ac = be/bc
5/ac = 10/(10+20)
5/ac = 10/30
ac = (30×5)/10
ac = 15 cm
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24. bd/ab = de/ac
12/ab = 9/21
ab = (21×12)/9
ab = 28 cm
ad = ab-bd = 28-12 = 16 cm
25. de/ac = be/bc
5/ac = 10/(10+20)
5/ac = 10/30
ac = (30×5)/10
ac = 15 cm