
三心複習
Authored by 洪銘凰 洪銘凰
Mathematics
8th Grade
Used 1+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
請選出正確選項
直角三角形的外心在三角形的外部
等腰三角形的外心在三角形的外部
鈍角三角形的外心在三角形的外部
銳角三角形的外心在三角形的外部
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如右圖,G 點為△ABC 的重心,H 點在 AD 上,
且 GD=DH,則下列何者的面積不等於△ABC 面
積的三分之一?
△ABG
△BCE
△CGH
四邊形BFGD
3.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
△ABC 中,O 點為外心,若∠BOC=150°,則∠BAC=幾度?
75度或110度
90度
75度或105度
30度或150度
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如圖,直角△ABC 中,∠B=90°、∠A=60°,
G 點為其重心,若 AB=3,則 BG= ?
2
3
1
5.
MULTIPLE CHOICE QUESTION
3 mins • 2 pts
如圖,G 點為等腰△ABC 的重心,AG 交 BC
於 D 點,若 AB=AC=10、BC=12,則△BGD
的面積=?
48
24
12
8
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
如圖,直角坐標平面上有一△OAB,若 A 點坐
標為 ( 4 , 3 )、B 點坐標為 ( 8 , 0 ),則△OAB 的
內心坐標為?
7.
MULTIPLE CHOICE QUESTION
1 min • 2 pts
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