Respostas

2013-12-07T23:05:34-02:00
A = D * d/ 2
12 = D * 4/2
12 = 2 * D
2D = 12
D = 12/2
D =
 6 m.
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2013-12-07T23:14:04-02:00
Area = d .D / 2
Al = 12 m

d .D /2 = 12
4 . D / 2 = 12
4D = 24
D = 6 m

As diagonais medem 4m e 6m
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