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Madhumitra
Subject: Maths
, asked on 9/2/18
A circle is drawn with the centre O PA are PB are tangents to the circle . Prove that KN=AK+BN
Answer
1
Aditi
Subject: Maths
, asked on 8/2/18
pls solve it widout giving any link
If the angle between two tangents drawn from an external point P to a
circle of radius a and centre O, is 60
°
, then find the length of OP.
Answer
1
Varsha Chandela
Subject: Maths
, asked on 7/2/18
proof this theorem
Q.
The length of tangents drawn from an external point to a circle are equal.
Answer
4
Jason
Subject: Maths
, asked on 7/2/18
A circle with radius R and center O is drawn . 2 tangents PQ and PR are drawn from point P and PO is twice the radius. Prove that PQR is an equilateral triangle
Answer
3
Mansi Jindal
Subject: Maths
, asked on 7/2/18
Q17 is my doubt?! And why is OP perpendicular bisector of AB
Q.17. In figure, AB is a chord of a circle, with centre O, such that AB = 16 cm and radius of circle is 10 cm. Tangents at A and B intersect each other at P. Find the length of PA.
Answer
1
Ayan
Subject: Maths
, asked on 6/2/18
Solve this:
Q. 1. In the given figure,
△
A
B
C
~
∆
A
D
E
.
if AE=2 cm, EC=3cm and DE = 1.6 cm, then find BC.
[Ans. BC=4 ( Using Thales' theorem)]
Q. 2. Mean of four observations is 12. If first, second, third and fourth observations are decreased by 1,2,3 and 4 respectively, then find the new means. [Ans. New Mean =9.5]
Q. 3. A letter is chosen at random from the letter of the word "PROBABILITY". Find the probability that is is not a vowel. [Ans. 7/11]
Answer
3
Mahek Harwani
Subject: Maths
, asked on 4/2/18
solve Q.18 no links
Q.18. In given figure XY and X'Y' are two parallel tangents to a circle with centre O and another tangent AB with point of contact C intersecting XY at A and X'Y' at B. Prove that
∠
A
O
B
=
90
°
.
Answer
1
Saksham
Subject: Maths
, asked on 4/2/18
Solve this:
Answer
3
Manav Sah
Subject: Maths
, asked on 3/2/18
Q.68. E is a point on the side AD of a rectangle ABCD such that DE = 6 cm, DA = 8 cm and DC = 6 cm. If CE extended meets the circumcircle of the rectangle at F, then the value of BF is [use
2
= 1.414]
Answer
0
Abhishek
Subject: Maths
, asked on 3/2/18
In the figure, if ∠APO = 40°, find ∠AOB
Answer
2
Gouri Lahoti
Subject: Maths
, asked on 2/2/18
If PAB is a secant and PT is a tangent then prove that angle 1 is equal to angle to an angle 3 is equal to angle 4.
Answer
2
Shweta Verma
Subject: Maths
, asked on 2/2/18
16
.
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A
P
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t
h
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e
n
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r
e
O
,
s
u
c
h
t
h
a
t
A
P
=
5
c
m
a
n
d
∠
A
P
B
=
60
°
.
.
F
i
n
d
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e
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g
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h
o
f
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h
e
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h
o
r
d
A
B
.
Answer
1
Sameer Ali
Subject: Maths
, asked on 2/2/18
29. The radii of two concentric circles are 13 cm and 8 cm. AB is a diameter of the bigger circle and BD is tangent to the smaller circle touching it at D and intersecting the larger circle at P, on producing. Find the length of AP.
Answer
1
Champ Jee
Subject: Maths
, asked on 1/2/18
Is the answer 130 degree.
I just want to ensure. See the question in the pic.
i
v
)
T
a
n
g
e
n
t
B
C
t
o
u
c
h
e
s
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t
A
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D
i
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h
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r
d
s
u
c
h
t
h
a
t
m
(
a
r
c
A
D
)
=
100
°
t
h
e
n
f
i
n
d
t
h
e
m
e
a
s
u
r
e
o
f
∠
C
A
D
.
Answer
3
Vikash Kumar
Subject: Maths
, asked on 1/2/18
Solve this:
Q.2. In figure, if PQ is a tangent, then find the value of
∠
P
O
Q
+
∠
Q
P
O
.
Answer
2
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What are you looking for?
If the angle between two tangents drawn from an external point P to a
circle of radius a and centre O, is 60, then find the length of OP.
Q. The length of tangents drawn from an external point to a circle are equal.
Q.17. In figure, AB is a chord of a circle, with centre O, such that AB = 16 cm and radius of circle is 10 cm. Tangents at A and B intersect each other at P. Find the length of PA.
Q. 1. In the given figure, if AE=2 cm, EC=3cm and DE = 1.6 cm, then find BC.
[Ans. BC=4 ( Using Thales' theorem)]
Q. 2. Mean of four observations is 12. If first, second, third and fourth observations are decreased by 1,2,3 and 4 respectively, then find the new means. [Ans. New Mean =9.5]
Q. 3. A letter is chosen at random from the letter of the word "PROBABILITY". Find the probability that is is not a vowel. [Ans. 7/11]
Q.18. In given figure XY and X'Y' are two parallel tangents to a circle with centre O and another tangent AB with point of contact C intersecting XY at A and X'Y' at B. Prove that .
I just want to ensure. See the question in the pic.
Q.2. In figure, if PQ is a tangent, then find the value of .