
九上-相似形應用
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
蔡佩旻 蔡佩旻
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16 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 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?
1:2
1:4
1:1
1:根號2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
已知△ABC的周長為12,△DEF的周長為21。若△ABC~△DEF,且AM、DN分別為三角形的對應高,則AM:DN=?
4:7
7:4
16:49
49:16
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
已知△ABC各邊的中點分別為D、E、F。若△ABC的面積為12,則△DEF的面積為多少?
2
3
4
6
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
將一個頂角為20度的等腰三角形影印縮放成2倍後,可得一新的等腰三角形,下列關於此一新等腰三角形的敘述,何者錯誤?
原等腰三角形的周長是新等腰三角形周長的一半
新等腰三角形的面積是原等腰三角形面積的4倍
新等腰三角形的一底角為80度
新等腰三角形的一頂角為40度
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
小軒在野外一棵樹下拍照,同一照片中小軒高2公分,樹高9公分,若小軒實際身高160公分,則樹的實際高度約多少公尺?
7.2
4.8
6.4
5.2
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
8
12
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
若一等腰三角形的頂角為30°,一腰長為8,則其面積為多少?
6
9
12
16
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