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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

八下 3-1 多邊形的內角與外角
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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.

FILL IN THE BLANK QUESTION

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

Media Image

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

Media Image

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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