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Vypočítaj dlžku strany štvorca, ak jeho obvod je 17dm.Odpoved O=4a
O=17dm:4=4,25dm
Vypocitaj dlzku strany štvorca, ak jeho obsah je 36m2.Odpoved S=6m
Vypočítaj obvod a obsah obdĺžnika s rozmermi 8,5m a 14cm. 14cm=0,14m O=2.(a+b) O=2.(8,5m+0,14m)=2.8,64=17,28m S=a.b S=8,5m.0,14m=1,19m2Obvod je 17,28m a obsah je 1,19m2.
vypočítaj obsah štvorca ktorého uhlopriečka má dížku 7cm S=7.7=49 S=49÷2 S=24,5cm2 Obsah je 24,5cm2.
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