HappyLiz
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The triangular sail of a toy sailboat is supposed to be a right triangle. The manufacturer says the sides of the sail have lengths of 4.5in, 6in, and 7in. Is the sail a right right triangle? If not how could you change one of the lengths to make a right triangle?

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To be a right angled triangle, it must follow the rule a² + b² = c² (where c is the longest side)

4.5² + 6² = 20.25 + 36 = 56.25
7² = 49
This is NOT a right angled triangle.

To make this into a right angled triangle, the longest side c should be longer. 
c = √56.25 = 7.5 inches

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