What is the Euler number of the region shown in the figure below?

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📊 Metrology and Measurements

Q. What is the Euler number of the region shown in the figure below?

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✅ Correct Answer: (B) -2

Explanation: the polygonal network given in the figure has 7 vertices, 11 edges and 2 faces. thus the euler number is given by the formula,

the polygonal network given in the figure has 7 vertices, 11 edges and 2 faces. thus the euler number is given by the formula,

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