2. 外语
  3. In the figure above, if, what is the value of r ? r =______

In the figure above, if, what is the value of r ? r =______

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问题
In the figure above, if, what is the value of r ?
r =______
选项
答案112.5
解析 From the figure, note that r° + s° must equal 180°. Therefore. Since you are also given in the question that, you can conclude that. Thus r == 112.5, and the correct answer is 112.5.
This explanation uses the following strategy.
Strategy 4: Translate from a Figure to an Arithmetic or Algebraic Representation
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