Question 1

若從一多邊形的一個固定頂點作對角線，最多可作出 $9$ 條對角線，則此多邊形為幾邊形？

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Question 2

如圖，下列敘述何者錯誤？

Accepted Answer

$12$ 為 $riangle ACD$ 的外角

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$12$ 為 $riangle ACD$ 的外角

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$12$ 為 $riangle ACD$ 的外角

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$12$ 為 $riangle ACD$ 的外角

Question 3

如圖，將兩個三角板重疊擺置，則 $9$ =？

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Question 4

已知正 $9$ 邊形每一內角為 $140^{\circ}$ ，則 $n$ =？

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Question 5

如圖，若 $9$ ， $140^{\circ}$ ，則 $n$ =？

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Question 6

如圖，已知 $9$ ， $140^{\circ}$ ， $n$ ，則 $\angle B$ =？

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Question 7

如圖， $9$ 的度數為何？

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Question 8

下列那一個角的餘角最大？

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Question 9

已知 $9$ 和 $140^{\circ}$ 互餘，且 $n$ 的 $\angle B$ 倍等於 $\angle A$ 補角的 $2$ 倍，則 $\angle A$ =？

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Question 10

$12$ 中， $riangle ACD$ 的外角為 $145^{\circ}$ ， $\angle A -\angle C =15^{\circ}$ ，則 $\angle A$ =？

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