题目信息
In isosceles triangle PQR, if the measure of angle P is 80º, which of the following could be the measure of angle R?
I. 20º
II. 50º
III. 80º
I. 20º
II. 50º
III. 80º
A:I only
B:III only
C:I and II only
D:II and III only
E:I, II, and III
参考答案及共享解析

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已选答案:
正确答案:
E:I, II, and III
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