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Gagan Jain
Subject: Maths
, asked on 15/5/18
This Q is about tangents so please explain it
39
.
△
A
B
C
i
s
a
r
i
g
h
t
a
n
g
l
e
d
t
r
i
a
n
g
l
e
w
i
t
h
A
B
=
3
c
m
.
A
c
i
r
c
l
e
i
s
t
o
u
c
h
i
n
g
i
t
s
s
i
d
e
s
A
B
a
n
d
A
C
w
i
t
h
c
e
n
t
r
e
O
a
n
d
d
i
a
m
e
t
e
r
B
D
.
B
D
=
2
c
m
.
F
i
n
d
l
e
n
g
t
h
o
f
C
D
.
(
A
)
1
(
B
)
3
4
(
C
)
1
4
(
D
)
N
o
n
e
o
f
t
h
e
s
e
Answer
2
Naina
Subject: Maths
, asked on 31/3/18
abcd is a cyclic quadrilateral in which angle a is equals to 2 x + 4 angle b is equals to x + 10 and angle c is equals to 4y-4 and angle d is equal to 4y-4,find x and y
Answer
1
Prithika
Subject: Maths
, asked on 24/3/18
Q74??
74. A square and an equilateral triangle have the same perimeter. Let A be the area of the circle circumscribed about the square and B be the area of the circle circumscribed about the equilateral in angle. if
A
B
=
p
q
, where HCF (p,q)=1, then the absolute value of (p-q) is
Answer
1
Daksh Mishra
Subject: Maths
, asked on 24/3/18
Q. In figure; find the value of x.
Answer
2
Arushi
Subject: Maths
, asked on 24/3/18
There are 2 concentric circles of radii 13 cm and 12 cm. Then the length of the chord of the outer circle which
touches the inner circle is___
Answer
1
Sunil Joshi
Subject: Maths
, asked on 21/3/18
prove that measure of arc= radius of circle*Angle subtended by arcr
Answer
1
Simran
Subject: Maths
, asked on 17/3/18
Plzz. Answer.. Q. No. 10 to 12
Q10. In figure
∠
PQR = 100° where P, Q and R are points on the circle with centre O. Find
∠
POR in the quadrilateral
Q11. The length, breadth and height of a room are 5 m, 4 and 3 m respectively. Find the cost of whitewashing the walls of the room and the ceiling at the rate of Rs.7.50 per m
2
.
Q12. Two coins are tossed simultaneously 500 times, and we get
Two heads : 105 times, One head : 275 times,
Find the probability of occurrence of each of these events.
Answer
1
Dhruv Malhotra
Subject: Maths
, asked on 15/3/18
Solve this:
18. In given figure ABC is an isosceles triangle with AB = AC and
∠
A
B
C
=
50
°
find
∠
B
D
C
a
n
d
∠
B
E
C
.
∠
B
D
C
a
n
d
∠
B
E
C
.
Or
In the given figure O is centre of circle of radius 5cm.
If
O
P
⊥
A
B
,
O
Q
⊥
C
D
;
A
B
∥
C
D
.
A
B
=
6
c
m
a
n
d
C
D
=
8
c
m
,
d
e
t
e
r
m
i
n
e
P
Q
.
Answer
1
Tushar
Subject: Maths
, asked on 12/3/18
Answer
plzzz
fast
↵
7. If a point C lies between two points A and B such that AC=BC then prove that AC=
1
2
AB.
8 If the difference between two supplementary angles is 40
°
Then find the angles.
9 A chord of a circle is equal to the radius of the circle. Find the angle subtended by the chord
at a point on the major arc.
10 construct an angle of 135
°
with ruler and compasse
Answer
2
Tushar
Subject: Maths
, asked on 12/3/18
Answer plzz fast
Answer
2
Parul Kohli
Subject: Maths
, asked on 10/3/18
4. If a = 3 + b, then
a
3
-
b
3
-
9
a
b
i
s
:
1. 9
2. 27
3. 81
4. 18
10. In the figure chord AB and CD when produced meet at point P. If
∠
A
O
C
=
θ
,
∠
B
O
D
=
α
then prove that
∠
A
P
C
=
θ
-
α
2
.
(O is the centre of the circle)
Answer
2
Aanvi
Subject: Maths
, asked on 10/3/18
Pls answer
Q. In the given figure, a cyclic quadrilateral PQRS is shown and an isosceles triangle PST with PT = TS is shown.
The line RST is a stright line. Also, PQ = QS
If
∠
PST = 72° and
∠
PSQ = 56°, then find :
(a)
∠
PST (2 marks)
(b)
∠
POS (2 marks)
(d)
∠
POS (2 marks )
(d)
∠
PRS (2 marks)
Answer
1
Parul Kohli
Subject: Maths
, asked on 10/3/18
9. Prove that the perpendicular bisector of a chord of a circular passes through the centre os the circle .
Answer
1
Parul Kohli
Subject: Maths
, asked on 10/3/18
Pls tell how to prove his question .
Prove the the perpendicular bisector of a chord of a circle passes through the centre of the circle.
Answer
1
Sumit Kumar Jha
Subject: Maths
, asked on 7/3/18
26) In the adjoining figure, ABCD is a cyclic quadrilateral whose side AB is a diameter of the 4 circle. If
∠
A
D
C
=
130
°
,
f
i
n
d
∠
B
A
C
.
Answer
2
1
2
3
4
5
Next
What are you looking for?
74. A square and an equilateral triangle have the same perimeter. Let A be the area of the circle circumscribed about the square and B be the area of the circle circumscribed about the equilateral in angle. if , where HCF (p,q)=1, then the absolute value of (p-q) is
touches the inner circle is___
Q10. In figure PQR = 100° where P, Q and R are points on the circle with centre O. Find POR in the quadrilateral
Q11. The length, breadth and height of a room are 5 m, 4 and 3 m respectively. Find the cost of whitewashing the walls of the room and the ceiling at the rate of Rs.7.50 per m2.
Q12. Two coins are tossed simultaneously 500 times, and we get
Two heads : 105 times, One head : 275 times,
Find the probability of occurrence of each of these events.
18. In given figure ABC is an isosceles triangle with AB = AC and find
Or
In the given figure O is centre of circle of radius 5cm.
If
7. If a point C lies between two points A and B such that AC=BC then prove that AC=AB.
8 If the difference between two supplementary angles is 40 Then find the angles.
9 A chord of a circle is equal to the radius of the circle. Find the angle subtended by the chord
at a point on the major arc.
10 construct an angle of 135 with ruler and compasse
1. 9
2. 27
3. 81
4. 18
10. In the figure chord AB and CD when produced meet at point P. If then prove that .
(O is the centre of the circle)
Q. In the given figure, a cyclic quadrilateral PQRS is shown and an isosceles triangle PST with PT = TS is shown.
The line RST is a stright line. Also, PQ = QS
If PST = 72° and PSQ = 56°, then find :
(a) PST (2 marks)
(b) POS (2 marks)
(d) POS (2 marks )
(d) PRS (2 marks)
Prove the the perpendicular bisector of a chord of a circle passes through the centre of the circle.