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Byju's Answer
Standard X
Mathematics
Relation between Inradius and Perimeter of Triangle
In triangle ...
Question
In triangle
A
B
C
,
right angle at
B
if
s
−
a
=
3
,
s
−
c
=
2
then
a
,
c
are
A
1
,
4
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B
3
,
4
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C
2
,
4
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D
None of these
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Solution
The correct option is
B
3
,
4
Given,
s
−
a
=
3
a
+
b
+
c
−
2
a
2
=
3
b
+
c
−
a
=
6
and
s
−
c
=
2
a
+
b
+
c
2
−
c
=
2
a
+
b
−
c
=
4
Adding them, we get
2
b
=
10
⇒
b
=
5
c
−
a
=
b
−
5
=
1
Also,
a
2
+
c
2
=
b
2
=
5
2
=
25
a
2
+
(
1
+
a
)
2
=
25
2
a
2
+
2
a
−
24
=
0
⇒
a
2
+
a
−
12
=
0
⇒
(
a
−
3
)
(
a
+
4
)
=
0
⇒
a
=
3
Hence
c
=
1
+
a
=
1
+
3
=
4
.
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