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y la medida mayor sea b
entonces la diagonal sea 2+a
pitagoras(2+a)²=a²+b² perimetro 2a+2b=14
4+4a+a²=a²+b² a+b=7
4+4a=b² a=7-b
4+4(7-b)=b²
4+28-4b=b² a=7-4
32-4b-b²=0 a=3cm
b²+4b-32=0
(b+8)(b-4)=0
b=-8 b=4
b=4cm x q no hay medidas negativas