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If P(2,3) and Q)2, 5) are points on a graph, calculate the length PQ

Mathematics
WAEC 2017

If P(2,3) and Q)2, 5) are points on a graph, calculate the length PQ

  • A. 6 units
  • B. 5 units
  • C. 4 units
  • D. 2 units
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Correct Answer: Option D
Explanation

\(\sqrt{(x_2 - x_1)^2 + (y_2 - Y_1)^2}\)

= \(\sqrt{(2 - 2)^2 + (5 - 3)^2}\)

= \(\sqrt{0^2 + 2^2}\)

= \(\sqrt{4}\)

= 2 units


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