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How long are the diagonals of a 9 x 12 rectangular picture frame?
Wiki User
∙ 14y ago
According to the "3-4-5" law of right triangles, if the two sides of the triangle are 3 units and 4 units, the hypotenuse must be 5 units.
So a diagonal must be 15 inches. The sides are 3 * 3 and 3 * 4, so the diagonal is 3 * 5.
Wiki User
∙ 14y ago
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