As shown in the figure, we know that ad = 5cm, B is the midpoint of AC, CD = 23ac

Let AC = x, have X + 23x = 5, the solution is: x = 3, that is, AC = 3cm, CD = 2, and B is the midpoint of AC, ab = BC = 32cm

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1. As shown in the figure, we know that ad = 5cm, B is the midpoint of AC, CD = 23ac
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