梯形與特殊四邊形

梯形與特殊四邊形

8th Grade

18 Qs

quiz-placeholder

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梯形與特殊四邊形

梯形與特殊四邊形

Assessment

Quiz

Mathematics

8th Grade

Hard

Created by

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

Media Image

如圖,已知矩形的兩條對角線交於O點。若∠AOD=120°,  AC\overline{AC}  =16㎝,求下列敘述何者錯誤?

 ∠AOB=60° 

△AOD面積=△AOB面積

矩形ABCD面積=64 3\sqrt{3}  

 AB\overline{AB}  + CD\overline{CD}   =20

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

如圖,梯形ABCD中, AD\overline{AD}   // BC\overline{BC}   ,E、F分別是兩腰的中點, AD\overline{AD} =8,  BC\overline{BC}  =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 2\sqrt{2}

812\frac{81}{2}

8122\frac{81\sqrt{2}}{2}

5.

FILL IN THE BLANK QUESTION

5 mins • 1 pt

Media Image

 如圖,梯形ABCD中, AD\overline{AD}  //  BC\overline{BC} ,E、F、G將 AB\overline{AB} 四等分,H、I、J將 DC\overline{DC} 四等分。若 AD\overline{AD} =10公分, EH\overline{EH} =15公分,求 FI\overline{FI}  GJ\overline{GJ}  BC\overline{BC}  = ________。

6.

FILL IN THE BLANK QUESTION

5 mins • 1 pt

Media Image

如圖,梯形ABCD中,兩底  AD\overline{AD}  BC\overline{BC}  的長分別為5、15, AB\overline{AB} =6, CD\overline{CD} =8,則梯形面積=_________。

7.

FILL IN THE BLANK QUESTION

5 mins • 1 pt

Media Image

如圖,在梯形ABCD中, AD\overline{AD} //  BC\overline{BC}  。如果  AE\overline{AE}  //  DC\overline{DC}  ,△ABE的周長=18, EC\overline{EC} =7,則梯形ABCD的周長=__________。

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