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Nets - class-VIII Online Quiz

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The difference between a rectangle and a cube is

  1. Rectangle is B-dimensional and cube is 2-dimensional.

  2. Rectangle and cube are both 2-dimensional.

  3. Rectangle is 2-dimensional and cube is 3-dimensional.

  4. None of these


Correct Option: C
Explanation:

The difference in rectangle and cube is that a rectangle is a 2-dimensional figure where the length and the breadth of the geometry are specified.

 A cube is a 3-dimensional figure where the length, breadth and depth of the geometry are specified.

Oblique sketches of solid shapes can be drawn as per measurements on _____ paper.

  1. non-isometric

  2. isometric

  3. blank

  4. None of these


Correct Option: B
Explanation:

Oblique sketches of solid shapes can be drawn as per measurements on isometric paper.

A cylinder has two faces which are ............

  1. Square

  2. Circle

  3. Sphere

  4. Triangle


Correct Option: B
Explanation:

A cylinder has two circular faces.

What is the base of the cone?

  1. Square

  2. Triangle

  3. Circle

  4. None of these


Correct Option: C
Explanation:

The base of cone is a circle.

What cross-sections do you get when you cut a brick vertically?

  1. Circle

  2. Triangle

  3. Cube

  4. None of these


Correct Option: D
Explanation:

When we cut a brick vertically then we get a rectangular cross-section. Hence, option (D) is correct.

What cross-sections do you get when you cut a candle horizontally?

  1. Rectangle

  2. Square

  3. Circle

  4. Triangle


Correct Option: C
Explanation:

A circular cross-section is formed when we cut a candle horizontally.

What cross-sections do you get when you cut a candle vertically?

  1. Circle

  2. Triangle

  3. Rectangle

  4. Square


Correct Option: C
Explanation:

When we cut a candle vertically then the cross-section formed is a rectangle.

If area of Hexagon whose vertices taken in order are $(0, 1), (1, 1), (1, 3), (-1, 4), (-3, 2)$ and $\left(-2, \dfrac{1}{2}\right)$ can be written in the form $\dfrac{a}{b}$(where a, b $\in$N and a and b are in their lowest form) then?

  1. a and b are co-prime

  2. $a+b$ is an even number

  3. $a+b$ is an odd prime

  4. $a^2+b^2=1000$


Correct Option: A

If we rotate a right triangle about his height then we get a ..........

  1. Rectangle

  2. Cube

  3. Cuboid

  4. Cone


Correct Option: D
Explanation:

If we rotate a right triangle about its height then we get a cone.

Which of the following is true for the net of a solid?

  1. A geometry net is a 2-dimensional shape that can be folded to form a 3-dimensional shape or a solid.

  2. A net is a pattern made when the surface of a three-dimensional figure is laid out flat showing each face of the figure.

  3. A solid may have different nets.

  4. All of the above


Correct Option: D
Explanation:
A geometry net is a 2-dimensional shape that can be folded to form a 3-dimensional shape or a solid. Or a net is a pattern made when the surface of a three-dimensional figure is laid out flat showing each face of the figure. A solid may have different nets.
Here are some steps to determine whether a net forms a solid:

1. Make sure that the solid and the net have the same number of faces and that the shapes of the faces of the solid match the shapes of the corresponding faces in the net. 
2. Visualize how the net is to be folded to form the solid and make sure that all the sides fit together properly.

Nets are helpful when we need to find the surface area of the solids.
Thus, all the statements are true.

How many squares does a net of a cube contain?

  1. $4$

  2. $6$

  3. $8$

  4. None of these


Correct Option: B
Explanation:

There are six faces of a cube hence there are six squares.

How many rectangles are there in net of a rectangular prism?

  1. 1

  2. 6

  3. 3

  4. 4


Correct Option: D

If a solid figure has $15$ edges and $10$ vertices, then the number of faces of a solid figure is 

  1. $9$

  2. $7$

  3. $11$

  4. $5$


Correct Option: B
Explanation:
Using Euler's formula

$V+F=E+2$ 

$E=15$

$V=10 $

$\therefore 10+F = 15+2$

$\therefore  F= 17-10 $

$\therefore F=7 $

The number of dimensions, a point has

  1. 0

  2. 1

  3. 2

  4. 3


Correct Option: A
Explanation:

A point just marks a place which has no length, no breadth and no thickness.

So a point is devoid of these three fundamental dimensions.
$\quad \therefore \quad $ A point has 0 number of dimension.
Ans- Option A.

......... of solid shapes can be folded to make the solid.

  1. 2D space

  2. 3D space

  3. nets

  4. none


Correct Option: C
Explanation:

Nets of solid shapes can be folded to make a solid

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