
數學 - 圓的面積 (6下C)
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42 questions
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1.
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1 min • 1 pt
一個圓的半徑是 5 厘米,求它的面積 (取 π=3.14)
2.
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1 min • 1 pt
一個圓的直徑是 14 厘米,求它的面積 (取 π=22/7)
3.
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1 min • 1 pt
一個半圓的半徑是 6 厘米,求它的面積 (取 π=3.14)
4.
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1 min • 1 pt
一個圓的半徑是 10 厘米,求它的面積 (取 π=3.14)
5.
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1 min • 1 pt
一個圓的直徑是 30 厘米,求它的面積 (取 π=3.14)
6.
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1 min • 1 pt
一個四分之三圓的半徑是 14 厘米,求它的面積 (取 π=22/7)
7.
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1 min • 1 pt
圓形時鐘的鐘面半徑是 16 厘米,求它的面積 (取 π=3.14)
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