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7 September, 11:39

A rectangle is 13 centimeters wide and 18 centimeters long. how long is its diagonal

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  1. 7 September, 14:33
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    You have to use the Pythagorean theorem a squared plus b squared is c squared so 13 squared plus 18 squared equals c squared. 13x13=169 18x18=324 169+324=493 so c squared is 493 to get c you square root 493 which equals 22.2 so the diagonal, c, is 22.2 centimeters long
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