In the figure above, what is the value of?

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问题

In the figure above, what is the value of

?

选项 A、2
B、3
C、4
D、5
E、6

答案C

解析 The sum of the measures, in degrees, of the three interior angles of any triangle is 180°. As shown in the figure, the three angles of the triangle have measures of x°, y°, and z°, so x + y + z = 180. Therefore,

= 4, and the correct answer is Choice C.

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