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Geometry Difficulty 2.2 Junior Find the answer Canada

In the diagram, $\angle PQR$ is a straight angle.The value of $x$ is

Pick one

Solution

Since $\angle PQR$ is a straight angle, its measure is $180\degree$ . Thus, the angles with measures $40\degree$ and $x\degree$ have a sum of $180\degree$ , or $40+x=180$ and so $x=180-40=140$ .

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