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Standard IX
Mathematics
Question
In the figure
A
B
|
|
D
C
and
A
C
and
P
Q
intersect each other at the point
O
. Prove that
O
A
.
C
Q
=
O
C
.
A
P
.
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Solution
Verified by Toppr
In
△
A
P
O
and
△
C
Q
O
∠
A
O
P
=
∠
C
O
Q
(vertically opposite angle)
∠
A
P
O
=
∠
C
Q
O
(alternative angle)
∠
P
A
O
=
∠
Q
C
O
(alternative angle)
Thus,
O
A
A
P
=
O
C
C
Q
So,
O
A
.
C
Q
=
O
C
.
A
P
Hence proved
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