如圖所示,一條長4.8m的繩子可繞圓形樹幹一周。該樹幹的半徑是多少cm?(答案須準確至一位小數)

F.2 CH13 求積法 (二) Quiz

Quiz
•
Mathematics
•
6th - 8th Grade
•
Hard
蕭宇倫先生 Xiao Alan
FREE Resource
23 questions
Show all answers
1.
FILL IN THE BLANK QUESTION
1 min • 1 pt
2.
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1 min • 1 pt
圖中所示為一個從大半圓移除小半圓後所得的圖形。求該圖形的周界。(答案須準確至三位有效數字)
3.
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1 min • 1 pt
4.
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1 min • 1 pt
在圖中,一個圓形泳池外圍有一條均勻闊度是2m的通道,而外圓的直徑是20m。求泳池的面積。(答案須準確至三位有效數字)
5.
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1 min • 1 pt
在圖中,一個圓形泳池外圍有一條均勻闊度是2m的通道,而外圓的直徑是20m。求通道的面積。(答案須準確至三位有效數字)
6.
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1 min • 1 pt
圖中所示的是一個運動場,它由長方形ABCD與兩個半圓所組成,其中AB=84m。永棋從B沿直線走至D的距離是116m。求該運動場的面積。(答案須準確至三位有效數字)
7.
FILL IN THE BLANK QUESTION
1 min • 1 pt
圖中所示的是一個運動場,它由長方形ABCD與兩個半圓所組成,其中AB=84m。永棋從B沿直線走至D的距離是116m。永棋再沿棕色線從D走到A。求永棋所走的總距離。(答案須準確至三位有效數字)
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