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Byju's Answer
Standard IX
Mathematics
Trapezium
The angles of...
Question
The angles of a quadrilateral are in the ratio
3
:
4
:
5
:
6
. The quadrilateral is a _____
A
Parallelogram
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B
Rectangle
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C
Square
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D
Trapezium
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Solution
The correct option is
C
Trapezium
Given that angles of a quadrilateral are in the ration
3
:
4
:
5
:
6
.
We know that sum of all angles of a quadrilateral
=
360
0
.
So, angles of quadrilateral are:
∠
A
=
3
18
×
360
=
60
,
∠
B
=
4
18
×
360
=
80
,
∠
C
=
5
18
×
360
=
100
,
∠
D
=
6
18
×
360
=
120
Now from figure, we have
∠
A
+
∠
D
=
60
+
120
=
180
i.e. sum of interior angles on the same side of the transversal
A
D
=
180
0
.
Therefore,
A
B
∥
D
C
Hence, the given quadrilateral is a trapezium.
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