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Valjak
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mirjana ra邸i miti
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Valjak
1.
2.
弌丐 弌丐
丕 丕 丕 丕 弌 丕 丕丶 弌丐丕 . 丐 弌丐 丕 丿:
3.
丐 :丶丼 丿
4.
弌 丶丼
丿 弌丼 弌 , 弌 丐弌 丐 弌 弌 丐丼 弌 弌
5.
弌 弌
弌 弌 弌丕 丿 弌 弌 : P=R* H R H
6.
丿丐 弌
弌 丕 丐 弌 弌 弌丐? 丐 丐
7.
舒从仂 亠弍舒 舒亠亳
于舒舒从 亟舒舒从仂 亠弍舒 舒亠亳 于舒舒从 亟舒 弍亳 仄仂 亟仂弍亳仍亳 亠亞仂于 仄亠亢弍亳 仄仂 亟仂弍亳仍亳 亠亞仂于 仄亠亢??
8.
M B B 舒从仂
亠仄仂 亳亰舒仆舒亳 仗仂于亳仆 于舒从舒? P=2B+M
9.
KakoKako 亠仄仂 亳亰舒仆舒亳
仗仂于亳仆亠亠仄仂 亳亰舒仆舒亳 仗仂于亳仆亠 仂仆仂于亠 亳 仂仄仂舒舒 于舒从舒?仂仆仂于亠 亳 仂仄仂舒舒 于舒从舒? 仆仂于舒 亠 从亞, 仗舒 亠: B=r2 仄仂舒 亠 仗舒于仂亞舒仂仆亳从, 亳亠 舒仆亳亠 2r 亳 H, 仗舒 亠 亠亞仂于舒 仗仂于亳仆舒: M=2rH
10.
Dakle, povr{inu vaqka izra~una}emo ovako: P=2B+M P=2r2 +2rH P=2r
(r+H)
11.
Zapremina vaqkaZapremina vaqka r r H r H V=r2 H
12.
Doma}i zadatak:Doma}i zadatak: 1.Pravougaonik
sa stranicama 26cm i 12cm , obr}e se oko du`e stranice. Izra~unaj povr{inu i zapreminu tela koje nastaje.
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