4-sinf kub

mavzu: kub kub 1. kubni to‘g‘ri burchakli parallele-piped deb aytish mumkinmi? tushuntirib bering. kubning: 8 ta uchi- qirrasi - yoqlari - 12 ta kubning: 8 ta uchi- qirrasi - yoqlari - 12 ta 6 ta kubning hamma qirralari bir-biriga teng. yoqlari esa teng kvadrat-lardan iborat. 2. simdan kub shakli yasalgan. ham- masi bo‘lib qancha sim ishlatilgan? 12x2=24 dm 3. qirrasining uzunligi: a) 1 cm; b) 5 cm; d) 4 cm bo‘lgan kub sirtining yuzini (hamma yoqlari yuzini) hisoblang. 1) s=1x1=1 kv cm 1 cm 2) 1x6=6 kv cm 3. qirrasining uzunligi: a) 1 cm; b) 5 cm; d) 4 cm bo‘lgan kub sirtining yuzini (hamma yoqlari yuzini) hisoblang. 1) s=5x5=25 kv cm 5 cm 2) 25x6=150 kv cm 3. qirrasining …

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