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Byju's Answer
Standard VIII
Mathematics
Constructing a Trapezium When Its Three Sides and One Angle Are Given
The acute ang...
Question
The acute angle made by the diagonals is:
A
74
∘
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B
63
∘
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C
37
∘
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D
16
∘
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Solution
The correct option is
A
74
∘
⇒
We know the properties of rectangle that, its opposite sides are equal and parallel.
⇒
All four angles of rectangle is 90
∘
⇒
So, by using these properties we are going to construct rectangle.
⇒
We have given one of it's side 4cm and diagonal 5cm.
⇒
Draw a line segment AB = 4cm.
⇒
Construct an angle of
90
∘
at point A and B.
⇒
Cut off AC = 5cm.
⇒
Take A as a center and radius same as side BC and cut of AD.
⇒
Join AC, BD and CD.
⇒
We have to measure an acute angle between diagonals.
∴
∠
A
O
D
=
∠
B
O
C
=
74
∘
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