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Byju's Answer
Standard VII
Mathematics
Equal Angles Subtend Equal Sides
In the figure...
Question
In the figure.
P
Q
∥
B
C
and
A
P
:
P
B
=
1
:
3
Find
a
r
(
Δ
A
P
Q
)
a
r
(
Δ
A
B
C
)
A
1
:
4
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B
4
:
1
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C
1
:
9
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D
2
:
9
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Solution
The correct option is
C
1
:
9
Given
P
Q
∥
B
C
⟹
△
A
B
C
∼
△
A
P
Q
⟹
A
P
A
B
=
A
Q
A
C
=
1
3
A
r
(
△
A
P
Q
)
A
r
(
△
A
B
C
)
=
1
2
(
A
P
)
(
A
Q
)
sin
A
1
2
(
A
B
)
(
A
C
)
sin
A
=
1
9
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Q.
In Fig. 7.248, PQ || BC and PQ :BC = 1 : 3. If ar(∆ABC) = 144 cm
2
, then ar(∆APQ) = ____________.