d = 1.414. To calculate the distance between these two points on a plane, we simply apply the formula:
√[(p₂ - p₁)² + (q₂ - q₁)²]
In this case:
√[(2 - 1²) + (3 - 2²] = √2 = 1.414
Notice how the distance between these two particular points corresponds both to the hypotenuse of a right triangle and the diagonal of a square.
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