8下3-4

8下3-4

8th Grade

14 Qs

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Assessment

Quiz

Mathematics

8th Grade

Practice Problem

Hard

Created by

曾偉倫 曾偉倫

Used 4+ times

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14 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

正三角形中,邊長為4公分。

請問高為多少?

232\sqrt{3}

434\sqrt{3}

12

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

正三角形中,邊長為4公分。

請問面積為多少?

8

 838\sqrt{3} 

434\sqrt{3}

16

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

下列關於等腰三角形的敘述,何者錯誤?

等腰三角形頂角的平分線會垂直平分底邊

等腰三角形的兩底角相等

等腰三角形底角的平分線會垂直其所對應的邊

等腰三角形兩腰上的高會相等

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

右圖,△ABC中, AB\overline{AB}  = AC\overline{AC}  。若 AD\overline{AD}  是∠BAC的角平分線,且 AD\overline{AD}  =10, BD\overline{BD}  =4,則△ABC的面積是多少?

30

40

20

10

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

如右圖,四邊形ABCD中,已知 AD\overline{AD}  ⊥ AB\overline{AB}    CD\overline{CD}    BC\overline{BC}  , ∠CDB=65°, AD\overline{AD}  = CD\overline{CD}  =3,求∠ABD=幾度。

90

65

25

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

如右圖,已知 AD\overline{AD}  = CD\overline{CD}  = BC\overline{BC}  ,∠BCD=30°,
則∠BDC=幾度,

30

60

75

90

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

 CD\overline{CD}  為 AB\overline{AB}  的中垂線。若 AB\overline{AB}  =24, OC\overline{OC}  =9, OD\overline{OD}  =16,則四邊形ADBC的周長為多少

70

80

90

100

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