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1,69=a^2 |√
√1,69=a
a=1,3
Odp: Bok tego kwadratu ma długość 1,3 dm.
a=p:a
a/bok kwadratu=1,69dm/2 :4
a=0,4225 dm
P=1,69
Bok=1,3
bo 1.3*1,3=1,69