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1st - 12th Grade

15 Qs

quiz-placeholder

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Assessment

Quiz

Mathematics

1st - 12th Grade

Practice Problem

Hard

Created by

Quyền Hồng

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15 questions

Show all answers

1.

FILL IN THE BLANK QUESTION

30 sec • 1 pt

Media Image

Cho hình vẽ, điền đoạn thẳng thích hợp vào chỗ chấm: sinA=...AC\sin A=\frac{...}{AC}  

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Cho tam giác ABC vuông tại C có BC=1,2 cm, AC=0,9 cmBC=1,2\ cm,\ AC=0,9\ cm  . Tính  cosB\cos B  .

0,8

1,2

3,1

0,6

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Khẳng định nào sau đây đúng? Cho hai góc phụ nhau thì:

sin góc này bằng cos góc kia

sin hai góc bằng nhau.

sin góc này bằng tan góc kia.

cos góc này bằng cot góc kia.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Cho tam giác ABC vuông tại C có AC=1cm, BC=2cmAC=1cm,\ BC=2cm . Tính  cosB\cos B   


 52\frac{\sqrt{5}}{2}  

 253\frac{2\sqrt{5}}{3}  

 255\frac{2\sqrt{5}}{5}  

 355\frac{3\sqrt{5}}{5}  

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Cho hình vẽ sau. Công thức nào sau đây đúng?

AB2=BH.HCAB^2=BH.HC

AB2=HC.BCAB^2=HC.BC

AB2=AC2+BC2AB^2=AC^2+BC^2

AB2=BH.BCAB^2=BH.BC

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Cho hình vẽ sau. Công thức nào sau đây đúng?

AH2=BH.HCAH^2=BH.HC

AH2=HC.HBAH^2=HC.HB

AB2=AC2+BC2AB^2=AC^2+BC^2

AB2=BH.BCAB^2=BH.BC

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Cho hình vẽ sau. Công thức nào sau đây đúng?

AH.BC=BH.HCAH.BC=BH.HC

AH.AC=HC.HBAH.AC=HC.HB

AH.BC=AB.ACAH.BC=AB.AC

AB2=BH.BCAB^2=BH.BC

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