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CBSE Questions for Class 6 Maths Understanding Elementary Shapes Quiz 6 - MCQExams.com
CBSE
Class 6 Maths
Understanding Elementary Shapes
Quiz 6
How many parallel and congruent bases does a cylinder have?
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0%
4
0%
3
0%
1
0%
2
Explanation
A cylinder is a space figure with two circular, parallel and congruent bases.
How many faces does a cuboid have?
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$$4$$
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$$6$$
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$$8$$
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None of the above.
Explanation
A cuboid is a $$3-D$$ solid object bounded by $$6$$ rectangular faces, with three faces meeting at each vertex.
Hence, a cuboid has $$6$$ faces.
How many faces does a cube have?
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$$4$$
0%
$$6$$
0%
$$8$$
0%
None
Explanation
Cube is a 3D solid object bounded by six square faces with three meeting at each vertex.
Hence a cube has $$6$$ faces.
Which angle of a triangle is a right angle?
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Angle C
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Angle A
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Angle B
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None of the above
Explanation
From the geometry of the figure it is clear that $$\angle B$$ is right angle.
So option $$C$$ is correct.
If one angle at a point is reflex angle, the other at that point may be :
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Acute angle
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Obtuse angle
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Straight angle
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Acute or obtuse angle
Explanation
We know, the angle formed at a point is $$\displaystyle { 360 }^{ o }$$.
When one of angle is reflex, it range from $$\displaystyle { 180 }^{ o }$$ to $$\displaystyle { 360 }^{ o }$$.
If angle is $$\displaystyle { 200 }^{ o }$$ then the other angle is $$\displaystyle { 160 }^{ o }$$, i.e obtuse angle.
If one reflex angle is $$\displaystyle { 300 }^{ o }$$ then other angle is $$\displaystyle { 60 }^{ o }$$ i.e acute angle.
Hence, the option $$D$$ is correct.
Which of the following is a reflex angle?
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$$\displaystyle { 180 }^{ o }$$
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$$\displaystyle { 360 }^{ o }$$
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$$\displaystyle { 204 }^{ o }$$
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$$\displaystyle { 135 }^{ o }$$
Explanation
We know, reflex angle must be between $$\displaystyle { 180 }^{ o }$$ and $$\displaystyle { 360 }^{ o }$$. It can't be equal to $$\displaystyle { 180 }^{ o }$$ or $$\displaystyle { 360 }^{ o }$$ as these are straight and complete angle, respectively.
Here, only $$204^o$$ is greater than $$180^o$$ and less than $$360^o$$.
Therefore, option $$C$$ is correct.
How many pairs of congruent parallel faces does a rectangular prism have?
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6
0%
3
0%
5
0%
4
Explanation
A rectangular prism has 3 pairs of congruent parallel faces.
Reflex angle is greater than _____ but less than _____angle.
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Complete, acute
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Acute, Straight
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Obtuse, Straight
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Straight, Complete
Explanation
Reflex angle is the angle which is greater than $$\displaystyle {180}^{ o }$$ and less than $$\displaystyle {360 }^{ o }$$.
Straight angle is $$\displaystyle { 180 }^{ o }$$ and complete angle is $$\displaystyle { 360 }^{ o }$$.
So reflex angle is greater than straight angle and less than complete angle.
Identify the 3D figure.
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Cylinder
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Cone
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Circle
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Cuboid
Explanation
The given 3D figure is cylinder.
Find the name of the triangle.
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isosceles
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equilateral
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scalene
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acute
Explanation
The name of the triangle is scalene triangle, because all the sides are different.
A ______ triangle has no congruent sides.
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isosceles
0%
equilateral
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acute
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scalene
Explanation
A scalene triangle has no congruent sides, all sides are different.
A ______ triangle has no equal angles.
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isosceles
0%
equilateral
0%
acute
0%
scalene
Explanation
A scalene triangle has all angles and sides unequal.
Identify the name of the triangle.
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isosceles
0%
equilateral
0%
scalene
0%
right-angled
Explanation
The diagram shows a scalene triangle.
A scalene triangle has no equal angles.
Identify the scalene triangle.
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0%
0%
0%
0%
Explanation
Scalene triangles are triangles with all three sides of different lengths and all three angles of different measure.
Option $$A$$ has all sides of same length.
Option $$B$$ and $$D$$ have two sides of same length.
So, only option $$C$$ is correct, where all $$3$$ sides and angles are different.
Identify the 3D figure.
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Rectangular prism
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Triangular prism
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Pyramid
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Cone
Explanation
The given 3D figure is pyramid.
Name the 3D figure.
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Cuboid
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Cube
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Cylinder
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Circle
Explanation
The name of the 3D figure is cube.
Identify the figure.
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Pyramid
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Cuboid
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Triangle
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Cube
Explanation
The given figure is a cuboid
Which of the following picture is not a 3D figure?
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0%
0%
0%
Explanation
Square is not a 3D figure.
Hence, option D is correct.
Which of the following is a straight angle?
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Angle that is less that $$90^{\circ}$$
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Angle that is exactly $$90^{\circ}$$
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Angle that is greater than $$90^{\circ}$$
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None of these
Explanation
Straight angle is the angle which is exactly $$180^{\circ}$$
Hence option $$D$$ is the correct answer.
Which one of the following figure is not a scalene triangle?
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0%
0%
0%
0%
Explanation
The second option is not a scalene triangle, because it has $$2$$ equal sides.
A triangle that has an angle greater than ____ is called as obtuse triangle.
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$$30^{o}$$
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$$60^{o}$$
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$$80^{o}$$
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$$90^{o}$$
Explanation
A triangle that has an angle greater than
$$90^{o}$$
is called as obtuse triangle.
A scalene triangle has three different side lengths and three different ______.
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radius
0%
angles
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arc
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symmetry
Explanation
A scalene triangle has three different side lengths and three different angles.
A ______ triangle is a triangle with one angle that is exactly $$90^{o}.$$
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right angled
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acute
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obtuse
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scalene
Explanation
A right angled triangle is a triangle with one angle that is exactly
$$90^{o}.$$
A triangle that has an angle greater than $$90^{o}$$ is called as ______ triangle.
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acute
0%
right angled
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equilateral
0%
obtuse
Explanation
A triangle that has an angle greater than $$90^{o}$$ is called as obtuse triangle.
Find the name of the triangle.
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acute
0%
obtuse
0%
scalene
0%
isosceles
Explanation
A triangle that has an angle greater than $$90^{o}$$ is called as obtuse triangle.
So, the name of the triangle is obtuse triangle.
Identify the obtuse triangle.
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0%
0%
0%
Explanation
A triangle that has an angle greater than $$90^{o}$$ is called as obtuse triangle.
An obtuse triangle will have one and only one _______ angle.
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acute
0%
obtuse
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scalene
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right angled
Explanation
An obtuse triangle will have one and only one obtuse angle, because the sum of angles of a triangle is $$180^{o}$$.
If there are two obtuse angles or an obtuse and a right angle the sum will exceed
$$180^{o}$$.
A right triangle is a triangle with one angle that is exactly ____ degrees.
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$$30^o$$
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$$45^o$$
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$$90^o$$
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$$180^o$$
Explanation
A right triangle is a triangle with one angle that is exactly $$90^o$$.
Which one of the following figure is an obtuse triangle?
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0%
0%
0%
0%
Explanation
A triangle that has an angle greater than $$90^{o}$$ is called as obtuse triangle.
Identify the triangle.
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0%
obtuse
0%
acute
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isosceles
0%
right angled
Explanation
Acute triangle is that which has all angles less than $$90^o$$.
So, the name of the figured triangle is an acute angled triangle.
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