梯形與特殊四邊形

Quiz
•
Mathematics
•
8th Grade
•
Hard
蕭毓頻 蕭毓頻
Used 16+ times
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18 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
下列敘述何者正確?
若四邊形是菱形,則對角線互相平分
若四邊形對角線互相平分,則此四邊形為菱形
若四邊形是矩形,則對角線互相垂直
若四邊形的對角線互相垂直且平分,則為正方形
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
如圖,已知矩形的兩條對角線交於O點。若∠AOD=120°, =16㎝,求下列敘述何者錯誤?
∠AOB=60°
△AOD面積=△AOB面積
矩形ABCD面積=64
+ =20
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
如圖,梯形ABCD中, // ,E、F分別是兩腰的中點,若 =8, =16,則梯形AEFD與梯形EBCF的面積比是多少?
3:5
5:7
1:2
2:3
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
有一正方形,其對角線長為9,則此正方形面積為多少?
81
81
5.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
如圖,梯形ABCD中, // ,E、F、G將 四等分,H、I、J將 四等分。若 =10公分, =15公分,求 + + = ________。
6.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
如圖,梯形ABCD中,兩底 、 的長分別為5、15, =6, =8,則梯形面積=_________。
7.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
如圖,在梯形ABCD中, // 。如果 // ,△ABE的周長=18, =7,則梯形ABCD的周長=__________。
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