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“花蕾飄飄”:任意多邊形外角和都為360°.五邊形的內角和為540°.五個外角度數的比為1:2:3:4:5.它們分別為:360°×1/15=24°360°×2/15=48°360°×3/15=72°360°×4/15=96°360°×5/15=120°五個內角分別為:1…
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