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

GRE QUANTITATIVE

GRE

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