
九上數學1-4
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
蔡佩旻 蔡佩旻
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8 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如右圖,△ABC是一個直角三角形公園,其中∠A=90°,AB=40公尺、AC=30公尺。小妍發現遛狗區 △EBD也是一個直角三角形,∠BED=90°,而且測量出D點剛好是的中點,請幫小妍計算出△EBD面積與△ABC面積關係,△EBD面積:△ABC面積=?
1:4
1:16
2:5
4:25
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如右圖,△ABC為邊長12的正三角形,且D、E、F分別為△ABC各邊中點,G、H、I分別為△DEF各邊中點,則下列哪個錯誤?
所有線段長的和63
△ABC面積=36根號3
△DEF面積=9根號3
△DEF周長為8
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
一部雲梯消防車之部分長度如右圖所示,其中雲梯(AB)長為30公尺,當雲梯與水平面成35°時,A點離地面的高度為多少公尺?(sin35°≒0.573576436,以四捨五入法求到小數點後第1位)
3.4
17.2
20.6
33.4
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如右圖,△ABC中,∠B=135°,∠C=30°,AB=4,求△ABC的面積為多少?
2根號6
4根號3
4根號3-4
8根號3-8
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
直角△ABC中,∠A=90°,AB=12,BC=20,AC=16。作的中垂線L,分別交、於D、E兩點,求CD=?
25
20
12.5
10
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如右圖,已知小妍的身高為160公分,在太陽下,當他的影子長為100公分時,量出旗杆的影子長為250公分,求旗杆長為多少公分?
200
300
400
500
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
直角△ABC中,已知∠B=90°,∠A=30°,若△ABC的面積為8根號3,則△ABC的周長為何?
12+4根號3
12
24+4根號3
24根號3
8.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如右圖,四邊形ABCD為平行四邊形,E點在AD 上,且BE 與CD 相交於F點。若 BC=10、DE =6,則△ABE面積:△DFE面積為多少?
2:3
4:9
5:3
25:9
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