على حسين خلف
09-06-2009, 04:09 AM
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ياسر يس
09-06-2009, 08:57 AM
حل طويل
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السلام عليكم ورحمة الله وبركاته
حل اخر
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أحمد سعد الدين
19-07-2009, 09:41 PM
Problem 43. Angles, Triangle. Level: High School, SAT Prep, College
In the figure, AB = BC = CD, and the measure of angle C is double the measure of angle A. Prove that x = 60°.
http://up.arabsgate.com/u/1524/3329/43242.jpg
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