[tex]s = \frac{3 + 3 + 3}{2} = 4.5[/tex]
[tex] area = \sqrt{4.5(1.5)(1.5)(15)} [/tex]
[tex]area = \sqrt{15.1875} = 3.897 {cm}^{2} [/tex]
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[tex]s = \frac{3 + 3 + 3}{2} = 4.5[/tex]
[tex] area = \sqrt{4.5(1.5)(1.5)(15)} [/tex]
[tex]area = \sqrt{15.1875} = 3.897 {cm}^{2} [/tex]