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Byju's Answer
Standard XIII
Mathematics
Distance Formula
If ABCD forms...
Question
If
A
B
C
D
forms a parallelogram, where
A
=
(
0
,
−
1
)
,
B
=
(
6
,
7
)
,
C
=
(
λ
,
3
)
and
D
=
(
−
2
,
3
)
, then the value of
λ
is
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Solution
Given :
A
=
(
0
,
−
1
)
,
B
=
(
6
,
7
)
,
C
=
(
λ
,
3
)
and
D
=
(
−
2
,
3
)
form a parallelogram, so
A
B
=
C
D
,
B
C
=
A
D
⇒
10
=
√
(
λ
+
2
)
2
⇒
λ
=
−
12
,
8
√
(
λ
−
6
)
2
+
16
=
√
4
+
16
⇒
λ
=
4
,
8
∴
λ
=
8
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Similar questions
Q.
If
A
B
C
D
forms a parallelogram, where
A
=
(
0
,
−
1
)
,
B
=
(
6
,
7
)
,
C
=
(
λ
,
3
)
and
D
=
(
−
2
,
3
)
, then the value of
λ
is
Q.
If the points
A
(
−
2
,
−
1
)
,
B
(
1
,
0
)
,
C
(
a
,
3
)
and
D
(
1
,
b
)
form a parallelogram
A
B
C
D
, find the value of
a
and
b
.
Q.
If A (-2, 1) B (1 , 0), C (x , 3 ) and D (1, Y) are the vertices of a Parallelogram ABCD, then find the values of x and y.
Q.
Question 6
If angles A, B, C and D of the quadrilateral ABCD, taken in order are in the ratio 3: 7: 6: 4, then ABCD is a
(A) rhombus
(B) parallelogram
(C) trapezium
(D) kite
Q.
(a) a,b,c are lengths of sides of an scalene triangle. If equation
x
2
+
2
(
a
+
b
+
c
)
x
+
3
λ
(
a
b
+
b
c
+
a
c
)
=
0
has real and distinct roots, then the value of
λ
is given by :
(a)
λ
<
4
3
(b)
11
3
<
λ
<
17
3
(c)
11
6
<
λ
<
15
4
(d)
λ
≥
1
(b) If a,b are the roots of
x
2
−
10
c
x
−
11
d
=
0
and c,d are the roots of
x
2
−
10
a
x
−
11
b
=
0
, then find the value, of
a
+
b
+
c
+
d
. (a,b,c,d are distinct numbers).
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