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Base=2x
Perímetro=78cm
__________
| |
|___ ______| x
2x
formula: Perimetro=2(base)+2(altura)
Sustituimos y hacemos la operación
P=2(2x) + 2(x)
78=4x+2x
78=6x
x=78/6------x=13
Sustituimos la x en nuestras medidas
__________
| |
|___ ______| 13cm
2(13)=26cm
SALUDOS!!