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Geometry and Trigonometry / Lines, angles, and triangles Difficulty: Easy
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In the figure, line p is parallel to line q , and line t intersects both lines. What is the value of x+142?

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Explanation

Choice D is correct. In the figure shown, the angle marked x° and the angle marked 142° form a linear pair of angles. If two angles form a linear pair of angles, the sum of the measures of the angles is 180°. Therefore, the value of x + 142 is 180 .

Choice A is incorrect. This is 90 less than 142 , not the sum of x and 142 .

Choice B is incorrect and may result from conceptual or calculation errors.

Choice C is incorrect. This is the measure, in degrees, of one of the angles shown.