八下 3-1 多邊形的內角與外角（重新佈題）
Authored by 老師 誠誠
Mathematics
8th Grade
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35 questions
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1.
OPEN ENDED QUESTION
1 min • 1 pt
直角的 2 倍＝ 度。
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2.
OPEN ENDED QUESTION
1 min • 1 pt
平角的 13 倍＝ 度。
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3.
OPEN ENDED QUESTION
1 min • 1 pt
周角的一半＝ 度。
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4.
OPEN ENDED QUESTION
1 min • 1 pt
若∠A＝34°，∠A 和∠B 互餘，且∠B 和∠C 也互餘，則∠B 和∠C 分別為多少度？
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5.
OPEN ENDED QUESTION
1 min • 1 pt
若一個角的餘角的 2 倍和它補角的 12 互為補角，則這個角的度數為何？
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6.
OPEN ENDED QUESTION
1 min • 1 pt
若∠A 和∠B 互補，∠A 和∠C 互餘，且∠B＋∠C＝140°，則∠A 為多少度？
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7.
OPEN ENDED QUESTION
1 min • 1 pt
如右圖，直線 L 與直線 M 相交形成四個角，∠1＝(3x)°，∠2＝(2x＋5)°，∠3＝(2y＋25)°，∠4＝(2y－5)°，分別求出 x、y 的值與∠1、∠2、∠3、∠4 的度數。
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