Respuesta :

Answer:

[tex]2~cm[/tex]

Step-by-step explanation:

[tex]Let ~ b~ be ~ base[/tex]

[tex]Area=\frac{1}{2} bh\\[/tex]

[tex]12=\frac{1}{2}b(12)[/tex]

[tex]b=2[/tex]

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hope it helps...

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