7 A triangle is right-angled if the sides are a = m2 − n2, b = 2mn and c = m2 + n2 where m and n are positive integers, and m > n.

Show that this is true by substituting into the equation c2 = a2 + b2.

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# 7 A triangle is right-angled if the sides are a = m2 − n2, b = 2mn and c = m2 + n2 where m and n are positive integers, and m > n. Show that this is true by substituting into the equation c2 = a2 +

7 A triangle is right-angled if the sides are a = m2 − n2, b = 2mn and c = m2 + n2 where m and n are positive integers, and m > n.

Show that this is true by substituting into the equation c2 = a2 + b2.