八下 3-1 多邊形的內角與外角
Authored by 老師 誠誠
Mathematics
8th Grade
Used 4+ times
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23 questions
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1.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
直角的 2 倍＝ 度。
(a)
2.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
若一個角的餘角的 2 倍和它補角的 互為補角，則這個角的度數為 (a) 度？
3.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
若∠A 和∠B 互補，∠A 和∠C 互餘，且∠B＋∠C＝140°，則∠A 為 (a) 度？
4.
FILL IN THE BLANKS 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。
(a)
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 BLANKS 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。
(a)
7.
FILL IN THE BLANKS 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？
(a)
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