
八下 3-1 多邊形的內角與外角
Authored by 老師 誠誠
Mathematics
8th Grade
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23 questions
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1.
FILL IN THE BLANK QUESTION
1 min • 1 pt
直角的 2 倍= 度。
2.
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1 min • 1 pt
3.
FILL IN THE BLANK QUESTION
1 min • 1 pt
若∠A 和∠B 互補,∠A 和∠C 互餘,且∠B+∠C=140°,則∠A 為 __ 度?
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
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)°,求 ∠3 的度數。
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
△ABC 中,已知∠C=∠A+∠B,則△ ABC 為何種三角形?
銳角三角形
直角三角形
正三角形
鈍角三角形
6.
FILL IN THE BLANK QUESTION
1 min • 1 pt
已知等腰三角形 ABC 的頂角∠A 的外角等於 140°,求∠B 的度數。
7.
FILL IN THE BLANK QUESTION
1 min • 1 pt
如右圖,∠B=60°,∠BAO=30°,∠BCO=20°,則由 A 經 B、C 到 O 點,共轉了多少度?
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