To find the length of the diagonal of the rectangle formed by the points A(1, 2), B(3, 2), C(3, 4), and D(1, 4), we can use the Pythagorean Theorem.
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First, we calculate the length of one side of the rectangle:
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The length between points A(1, 2) and D(1, 4) is the difference in the y-coordinates: \[ 4 - 2 = 2 \]
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The length between points A(1, 2) and B(3, 2) is the difference in the x-coordinates: \[ 3 - 1 = 2 \]
Therefore, the sides of the rectangle are both \(2\) units.
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Next, to find the diagonal \(d\), we apply the Pythagorean Theorem: \[ d = \sqrt{(\text{length})^2 + (\text{width})^2} \] Substituting the lengths we found: \[ d = \sqrt{(2)^2 + (2)^2} = \sqrt{4 + 4} = \sqrt{8} \]
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Simplifying \(\sqrt{8}\): \[ d = \sqrt{4 \times 2} = 2\sqrt{2} \approx 2 \times 1.414 = 2.828 \]
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Rounding this to the nearest hundredth gives: \[ d \approx 2.83 \]
Hence, the length of the diagonal is 2.83.