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Junior High
Mathematics
這題怎麼解
Mathematics
Junior High
about 1 yearago
chen
這題怎麼解
3x3x8 = 9×8 1 141 =72 3 右圖是一個圓錐的展開圖,其側面展開後是一個半徑為9公分的扇形, 底圓的半徑為4公分,則側面扇形面積與底圓面積的比為多少? (A)2:1 (B)3:2 (C)9:4 (D)81:16 第3章 B 圖一的直角柱由3個矩形側面和2個正三角形底面組成,其中矩形的面積 為a,正三角形的面積為b。若將4個圖一的直角柱緊密堆疊成圖二的直 角柱,則圖二的直角柱之表面積為何? 陳 108會考第4題
Answers
穿山乙
about 1 yearago
如圖
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