<span>Triangle NRM has legs m and n, and r is the length of its longest side.
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and given that ⇒ r² = m² + n²
<span>Ben constructed a right triangle EFD with legs m and n
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<span>so, both of the triangles NRM and EFD have legs with sides m and n
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<span>beside that the third side of NRM is equal to the third side EFD, i.e ⇒ r = f
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<span>which is proved from the statement number 4
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<span>So, the sides of the triangle NRM are congruent to the sides of triangle EFD
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So, the <span>reason which best fits statement 5 is </span><span>⇒
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