<PRE><B>Question 350526</B>
HI,
*Note: Let x be the length each side of the square. Then (x+4) will be the length of each side of the equilateral triangle.
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Perimeter is the length of all sides of each.
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write as You Read
3(x+4) = 4x + 5
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simplify and Solve
3x + 12 = 4x + 5
7in = x
Side of the triangle is 11in
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check your answer
3*11 = 28 + 5</PRE>