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2025年3月国际D卷练习 · 第 21 题

2025年3月国际D卷练习 · 原库模块 1 · Q21 原库参考解析

In triangle \( RST \) , the measure of angle \( R \) is 39°, the measure of angle \( S \)  is x°, and the measure of angle \( T \) is \( \left(5x-3\right)° \). Point \( L \) lies on \( RS \), point \( K \) lies on \( ST \) , and \( LK \) is parallel to \( RT \) . What is the measure, in degrees, of angle \( SKL \)? (Disregard the degree symbol when entering your answer.)

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