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ZX-AB72AF62B82026年6月国际B卷 · 第 18 题
2026年6月国际B卷 · 原库模块 2 · Q18 参考答案
In isosceles triangle \( ABC \) sides \( AB \) and \( AC \) are congruent. Point D divides side \( BC \) such that the length of \( BD \) is \( \frac{2}{3} \) of the length of \( BC \). Point E lies on side \( AB \) and point F lies on side \( AC \) such that when segments \( DE \) and \( DF \) are drawn, angle \( BED \) is congruent to angle \( CFD \). If the length of \( BE \) is 12, what is the length of \( CF \)?
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