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CBSE Questions for Class 6 Maths Understanding Elementary Shapes Quiz 4 - MCQExams.com
CBSE
Class 6 Maths
Understanding Elementary Shapes
Quiz 4
$$\displaystyle 96^{0}$$ is an example of-
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0%
Acute
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Obtuse
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Right
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None of these
Explanation
obtuse angles are those angles which are greater than 90 degrees and less than 180 degrees..
so,96 degrees is an example of obtuse angle..
A Rhombus also satisfies the properties of a:
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Square
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Parallelogram
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Trapezium
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None of these
Explanation
A rhombus is a parallelogram. The definition of a parallelogram is a quadrilateral that has $$2$$ pairs of parallel lines.
A parallelogram has properties including $$2$$ pairs of congruent sides, $$2$$ pairs of congruent opposite angles, supplementary consecutive angles, and diagonals that bisect each other.
A rhombus has all of these properties.
The triangle formed by $$BC=8.2 cm$$, $$AC=7 cm$$ and $$ \displaystyle \angle C = 120^{\circ} $$ is-
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An obtuse angled triangle
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An acute angle triangle
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A right angled triangle
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None of these
Explanation
In△ABC,
$$BC=8.2cm,AC=7cm$$ and $$\angle C=120°$$
Here, we can see triangle contain one obtuse angle.
So,△ABC, is an obtuse angled triangle
Option A is the correct answer.
A quadrilateral is having _____.
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one diagonal
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two diagonals
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three diagonals
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four diagonals
Explanation
A quadrilateral is a four-sided polygon.
Here, $$ABCD$$ is a quadrilateral having four sides $$AB,BC,CD$$ and $$AD$$
Diagonal is a line segment that goes from one corner to another.
The diagonals of quadrilateral $$ABCD$$ are $$AC$$ and $$BD$$.
$$\therefore$$ A quadrilateral is having two diagonals.
Name of the the given shape is
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Cone
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Circle
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Square
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Sphere
Explanation
It has 2 faces $$\rightarrow$$ 1 curved face and 1 flat face. It has 1 curved edge. it is Cone
Following name of the shape is ---
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Cylinder
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Square
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Sphere
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Cube
Explanation
It has four sides and four corners. All its sides are equal.
What is shape of triangle in the following ?
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0%
0%
0%
Explanation
Correct answer is B..
$$\displaystyle 170^{0}$$ is an example of-
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0%
Acute
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Right
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Obtuse
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None of these
Explanation
angles greater than 90 degrees and less than 180 degrees are known as obtuse angles..
hence 170 degrees is an example of obtuse angle..
If one angle of a triangle is equal to half the sum of the other two equal angles, then the triangle is
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Isosceles
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Scalene
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Equilateral
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Right-angled
Explanation
$$\displaystyle \angle A=\frac { 1 }{ 2 } \left( \angle B+\angle C \right) $$
$$\displaystyle \angle A+\angle B+\angle C=\frac { 1 }{ 2 } \left( \angle B+\angle A \right) $$
$$\displaystyle or\quad \angle B+\angle C={ 90 }^{ o }or\angle A={ 90 }^{ o }$$
Choose the false statement from the following ?
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All sides of a square are equal
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Cuboid is a three dimensional figure
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A cuboid has 3 pairs of opposite faces
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The number of vertices of a cube is 6
Explanation
The number of vertices in a cube are 8.
A triangle with one obtuse and two acute angles is called
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right angled triangle
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acute angled triangle
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obtuse angled triangle
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none
Explanation
An obtuse triangle (or obtuse-angled triangle) is a triangle with one obtuse angle (greater than 90°) and two acute angles.
The sum of angles in a triangle must be 180° and no triangle can have more than one obtuse angle.
So option C is the correct answer.
Which of the following is not a polygon?
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0%
0%
0%
None of these
Explanation
A polygon is one that is made of straight-line segments and encloses a single area that is bounded by them.
Triangle has _______ sides and three vertices.
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Three
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Four
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Two
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Six
Explanation
A polygon made up of three sides is known as triangle.
What is shape of square in the following ?
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0%
0%
0%
Explanation
correct answer is A option
Cuboid has _______ flat faces.
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$$4$$
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$$5$$
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$$6$$
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$$3$$
Explanation
A cuboid has $$6$$ flat square faces.
Hence, option C is correct.
Cube has $$6$$ flat faces and _________ straight edges.
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$$6$$
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$$8$$
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$$10$$
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$$12$$
Explanation
cube has $$12$$ edges.
Which of the following figure has six faces?
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0%
0%
0%
Explanation
Out of the given figures, we can see that the figure in option B has $$3$$ faces visible from the front. It will have $$3$$ more faces opposite to the visible faces.
Hence, option B is correct.
Square has ________ sides and four corners---
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Three
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Four
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Two
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One
Explanation
square has 4 sides and four corners
Cylinder has _________ curved edges.
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4
0%
2
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3
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1
Explanation
A cylinder has two curved edges, where the cylinderical part meets the circular base and the top.
A polygon is classified by the number of ____ they have.
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angles
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sides
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diagonals
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by the interior space
Explanation
The polygon is classified by the number of sides.
Example: A $$3$$ sided figure is a triangle.
A $$4$$ sided figure is a quadrilateral.
Therefore, option $$C$$ is the correct answer.
There are ____ number of polygons.
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infinite
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finite
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four
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three
Explanation
We classify the polygons by their number of sides.
So, it can be any number only it should have line segments and it should be a closed figure.
Therefore, $$A$$ is the correct answer.
How many edges are there in a cuboid?
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3
0%
4
0%
5
0%
6
0%
12
Explanation
By
elders
formula
the numbers of faces
F
, of vertices
V
, and of edges
E
of any convex polyhedron are related by the formula
F
+
V
=
E
+ 2. In the case of a cuboid this gives 6 + 8 = 12 + 2; that is, like a cube, a cuboid has 6 faces
, 8
vertices, and 12 edges.
Polygons are ............... figures.
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many sided
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one sided
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has no sides
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two sides
Explanation
A polygon should be at least 3 sided to make a closed figure. A polygon can be as many number of line segments.
Therefore, A is the correct answer
A polygon has _____ number of angles as sides.
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alternate
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different
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unequal
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equal
Explanation
The number of line segments in a polygon is same as the number of angles.
Therefore, D is the correct answer.
The triangle, quadrilateral, pentagon are all examples of _____.
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Diagonal
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Open curve
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Polygon
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Circles
Explanation
A polygon is one that is made of straight-line segments and encloses a single area that is bounded by them. Triangle, quadrilateral, and pentagon are closed figures and have only line segments.
Therefore, $$C$$ is the correct answer.
A triangle whose........... angle(s) is $$\displaystyle { 90 }^{ o }$$ is called a right angled triangle.
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$$0$$
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$$3$$
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$$2$$
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$$1$$
Explanation
A triangle whose one angle is $$\displaystyle { 90 }^{ o }$$ is called a right angled triangle.
A closed figure is called a polygon if it has
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more than $$2$$ line segments
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more than $$1 $$ line segments
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less than $$10$$ line segments
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less than $$2$$ line segments
Explanation
A polygon is one which is made of straight line segments and encloses a single area that is bounded by them.
For which we need more than $$2$$ line segments.
Therefore, $$A$$ is the correct answer.
A simple closed curve made up of only line segments is called a _____.
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curve
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polygon
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surface
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none of these
Explanation
A polygon is one which is made of straight line segments and encloses a single area that is bounded by them.
Therefore, B is the correct answer.
How many congruent faces does a cube have?
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$$6$$
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$$3$$
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$$5$$
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$$4$$
Explanation
A cube has $$6$$ faces. An example of cube is a a dice where every face is numbered from one to six.
Thus a cube has $$6$$ congruent faces.
Which of the following polygon has no diagonal?
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Quadrilateral
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Heptagon
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Triangle
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Pentagon
Explanation
A diagonal is a line segment joining two opposite vertices. Since we cannot have diagonal to the vertex of either side, as it would lay on top of a side. Hence triangle being only 3 sides, each vertex joining vertex is its own side. So there are no diagonals in a triangle.
Therefore, C is the correct answer.
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