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Byju's Answer
Standard XII
Mathematics
Area of Triangle with Coordinates of Vertices Given
Find the side...
Question
Find the side if a square whose area is equal to the area of a triangle whose vertices are
A
(
3
,
2
)
,
B
(
11
,
8
)
and
C
(
8
,
12
)
.
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Solution
Δ
A
B
C
=
1
2
∣
∣ ∣
∣
3
2
1
11
8
1
8
12
1
∣
∣ ∣
∣
R
2
→
R
2
−
R
1
,
R
3
→
R
3
−
R
1
Δ
A
B
C
=
1
2
∣
∣ ∣
∣
3
2
1
8
6
0
5
10
0
∣
∣ ∣
∣
=
1
2
∣
∣
∣
8
6
5
10
∣
∣
∣
=
25
Hence side of the square is
=
√
25
=
5
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