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Byju's Answer
Standard IX
Mathematics
Pythagoras Theorem
The diagonals...
Question
The diagonals of a rhombus
A
B
C
D
are
6
c
m
and
8
c
m
. Find the length of a side of the rhombus.
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Solution
Diagonals of a rhombus bisect each other at right angles.
Let point of intersectio of diagonals be
O
So,
O
D
=
3
c
m
,
O
A
=
4
c
m
From Right angled triangle
△
A
O
D
,
⇒
A
D
2
=
O
A
2
+
O
D
2
(pythoagorus theorem)
⇒
A
D
2
=
4
2
+
3
2
⇒
A
D
2
=
16
+
9
⇒
A
D
2
=
25
⇒
A
D
=
5
c
m
A
D
is side of the rhombus .
So, length of side of the rhombus is
5
c
m
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