Quiz about Grade 8

Question 1

Question 1. Quadrilateral ABCD is a rhombus with perimeter 48cm. The length of the side of rhombus is equal to

Accepted Answer

12cm

Answer

48cm

Answer

12

Answer

24cm

Question 2

Question 2. Given the lengths of sides of a rectangular are 6cm and 8cm, respectively. What is the length of the diagonal?

Accepted Answer

10cm

Answer

8cm

Answer

6cm

Answer

12cm

Question 3

Question 3. The sum of all angles in a quadrilateral is equal to

Accepted Answer

$$360^0$$

Answer

$$270^0$$

Answer

$$540^0$$

Answer

$$180^0$$

Question 4

Question 4. Which of the following sentences is false?

Accepted Answer

A trapezoid with two legs equal is a parallelogram.

Answer

A trapezoid whose two diagonals are equal is an isoceles trapezoid.

Answer

A trapezoid with two bases equal is a parallelogram.

Answer

A quadrilateral with two diagonals intersecting at the midpoint of each is a parallelogram.

Question 5

Question 5. If triangle ABC is similar to triangle DEF with the ratio of similarity k = 2 and AB = 16cm, which of the following results is correct?

Accepted Answer

DE = 8cm.

Answer

DE = 4cm.

Answer

DE = 16cm.

Answer

DE = 10cm.

Question 6

Question 6. Let a, b be a real numbers such that $$\frac{2x+1}{x^2+6x\ +9}=\frac{a}{x+3}+\frac{b}{\left(x+3\right)^2}$$ . The value of a+b is equal to

Accepted Answer

-3.

Answer

1.

Answer

-5.

Answer

7.

Question 7

Question 7. The value of expression $$A=x^5-3x^2y^3$$ with x= -2 and y=3 is equal to

Accepted Answer

-356

Answer

356

Answer

292

Answer

-292

Question 8

Question 8. The value of x so that the value of fraction $$\frac{x.\left(x-2\right)}{x}$$ equals to 0

Accepted Answer

2

Answer

No solution

Answer

0

Answer

-2

Question 9

Question 9. Which of the following statements is true?

Accepted Answer

$$\left(a-b\right)^2+4ab=\left(a+b\right)^2$$

Answer

$$\left(a-b\right)^2=a^2+b^2+4ab$$

Answer

$$\left(a-b\right)^2=a^2-b^2-4ab$$

Answer

$$\left(a+b\right)^2=a^2+b^2$$

Question 10

Question 10. Which of the following equations is a first-degree equation in one unknown?

Accepted Answer

$$2x+3=0$$

Answer

$$2x^2+3=0$$

Answer

$$2x+3y=0$$

Answer

$$0x+3=0$$

Grade 8

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