22-dars matematika 3-sinf
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mavzu: to’g’ri burchakli parallelepedning yoyilmasi 8 ta uch, 12 ta qirra, 6 ta yoq bor 10 ta uch, 15 ta qirra, 7 ta yoq bor 6 ta uch, 9 ta qirra, 5 ta yoq bor a --7 dm. b --4 dm. c --5 dm. l --? dm yechish: l=a*4+b*4+c*4 l=7*4+4*4+5*4= 28+16+20=64 dm javob : qirrasi 12 ta, qirra uzunligi 64 dm to'g'ri burchakli parallelepiped yasash mumkin a --5 dm. b --8 dm c --6 dm s --? kv dm a) yoqlari 6 ta, bir xil yoqlari 3 ta: qizil, yashil, ko'k b) ko'k rangli yoqlari 2 ta eni --8 dm bo'yi --6 dm s--? kv dm yechish : s =8*6*2=48*2=96 kv dm javob : 96 kv dm d) qisil rangli …
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