
翰林國中數學3上CH1-4 相似三角形的應用與三角比
Authored by 翰林數學 翰林數學
Mathematics
9th Grade
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
兩個相似三角形的面積比為 1:2,則對應邊的比為多少?
1:
1:4
1:1
1:2
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如圖,△ABC 的兩中線 、 相交於 O,連 ,則△BOC 面積:△DOE 面積=?
2:1
3:1
4:1
5:1
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
已知△ABC~△DEF,且 ,下列何者正確?
△ABC 的面積:△DEF 的面積=3:5
△ABC 的外角和:△DEF 的外角和=3:5
∠B:∠E=3:5
△ABC 的周長:△DEF 的周長=3:5
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列敘述何者正確?
將一圖形影印縮放 3 倍,指的是面積縮放 3 倍
將一個圖形影印縮放 3 倍,其對應邊與對應角都會縮放 3 倍
兩個相似三角形中的對應線段比(如角平分線、高、中線),都與其對應邊長比相同
兩個三角形中,若有兩組對應邊成比例,則兩個相似三角形中的對應線段比(如角平分線、高、中線)皆相等
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如圖,△ABC 中,∠A=90°, ,平分∠BAC,若 ,求 ?
5
10
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如圖,有一支夾子 , 。如果在夾子前面有一長條的硬物 長 6 公分,想用 A、D 夾住 P、Q 兩點,那麼手握的地方 要張開多少公分方可夾住 ?
3
2
2.5
1
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如圖,四邊形 ABCD 中,E、F、G、H 分別是 、 、 、 的中點,已知四邊形 EFGH 面積為 36 平方單位,則四邊形 ABCD 面積為多少平方單位?
72
108
144
180
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