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The length of the diagonal is found using the Pythagorean theorem

It is the square root of (162 +122 )=the square root of 400=20

Note, if you know about 3,4,5 triangles, then you could multiple each number by 4 and have a
12,16,20 triangle. The rectangle in question if made of two of those.

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15y ago

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Q: What is the diagonal of 16x12?
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