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Byju's Answer
Standard VII
Mathematics
Angle Bisector of a Triangle
In the given ...
Question
In the given figure,
B
C
⊥
A
B
,
A
E
⊥
A
B
BC⊥AB,AE⊥AB
. Shoe that
D
E
⋅
B
C
=
A
D
⋅
A
B
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Solution
We have
∠
A
B
C
=
∠
A
D
E
[Each equal to
90
∘
]
∠
A
C
B
=
∠
E
A
D
[Alternate angles]
∴
By
A
A
similarity
Δ
A
B
C
∼
Δ
E
D
A
⇒
B
C
A
B
=
A
D
D
E
⇒
D
E
⋅
B
C
=
A
D
⋅
A
B
.
[
h
e
n
c
e
p
r
o
v
e
d
]
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Q.
In the given figure, DE || BC such that AE = (1/4) AC. If AB = 6 cm, find AD.