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Byju's Answer
Standard XII
Mathematics
Perpendicular Distance of a Point from a Plane
Point, Plane:...
Question
Point, Plane:
(
3
,
−
2
,
1
)
,
2
x
−
y
+
2
z
+
3
=
0
.
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Solution
We know that the distance between a point
p
(
x
1
,
y
1
,
z
1
)
and a plane
A
x
+
B
y
+
C
z
=
D
is given by,
d
=
∣
∣ ∣
∣
A
x
1
+
B
y
1
+
C
z
1
−
D
√
A
2
+
B
2
+
C
2
∣
∣ ∣
∣
.
.
.
.
(
1
)
Thus distance of point
(
3
,
−
2
,
1
)
from the plane
2
x
−
y
+
2
z
+
3
=
0
is
d
=
∣
∣ ∣ ∣
∣
2
×
3
−
(
−
2
)
+
2
×
1
+
3
√
(
2
)
2
+
(
−
1
)
2
+
(
2
)
2
∣
∣ ∣ ∣
∣
=
13
3
=
13
3
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