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GeoGebra
PMC 2009-10 Q11
Author:
Arthur Lee
題目十一
紅色的圓上有6點，每兩點相連，成15條線段。若適當地移動這些點，該15條線段可最多把圓分為31個區域。同樣地，綠色的圓上有7個可移動的點，共21條線。這些線可以把綠色的圓分為最多幾個區域？
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