These problems are designed to develop skills in solving for unknown angles in isosceles triangles, specifically identifying the values of specific angles given limited information. Each question contains a diagram of an isosceles triangle with one angle labeled, and students are tasked with determining the value of another angle. The answers are presented in multiple-choice format, aimed at reinforcing understanding of triangle properties, particularly the fact that isosceles triangles have two angles that are equal. This topic is a part of a broader unit on geometry dealing with isosceles and equilateral triangles.
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What do we know about angle 'S'?