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Gagan Jain
Subject: Math
, asked on 15/5/18
This Q is about tangents so please explain it
$\mathbf{39}\mathbf{.}\mathbf{}\u25b3ABCisarightangledtrianglewithAB\hspace{0.17em}=3cm.AcircleistouchingitssidesABandACwithcentreOanddiameterBD.BD=2cm.FindlengthofCD.\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}\left(A\right)1\left(B\right)\frac{3}{4}\phantom{\rule{0ex}{0ex}}\left(C\right)\frac{1}{4}\left(D\right)Noneofthese$
Answer
2
Naina
Subject: Math
, 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: Math
, 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
$\frac{A}{B}=\frac{p}{q}$
, where HCF (p,q)=1, then the absolute value of (p-q) is
Answer
1
Daksh Mishra
Subject: Math
, asked on 24/3/18
Q. In figure; find the value of x.
Answer
2
Arushi
Subject: Math
, 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: Math
, asked on 21/3/18
prove that measure of arc= radius of circle*Angle subtended by arcr
Answer
1
Simran
Subject: Math
, asked on 17/3/18
Plzz. Answer.. Q. No. 10 to 12
Q10. In figure
$\angle $
PQR = 100° where P, Q and R are points on the circle with centre O. Find
$\angle $
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: Math
, asked on 15/3/18
Solve this:
18. In given figure ABC is an isosceles triangle with AB = AC and
$\angle ABC=50\xb0$
find
$\angle BDCand\angle BEC.$
$\angle BDCand\angle BEC.$
Or
In the given figure O is centre of circle of radius 5cm.
If
$OP\perp AB,OQ\perp CD;AB\parallel CD.AB=6cmandCD=8cm,determinePQ.$
Answer
1
Tushar
Subject: Math
, 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=
$\frac{1}{2}$
AB.
8 If the difference between two supplementary angles is 40
$\xb0$
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
$\xb0$
with ruler and compasse
Answer
2
Tushar
Subject: Math
, asked on 12/3/18
Answer plzz fast
Answer
2
Parul Kohli
Subject: Math
, asked on 10/3/18
4. If a = 3 + b, then
${a}^{3}-{b}^{3}-9abis:$
1. 9
2. 27
3. 81
4. 18
10. In the figure chord AB and CD when produced meet at point P. If
$\angle AOC=\theta ,\angle BOD=\alpha $
then prove that
$\angle APC=\frac{\theta -\alpha}{2}$
.
(O is the centre of the circle)
Answer
2
Aanvi
Subject: Math
, 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
$\angle $
PST = 72° and
$\angle $
PSQ = 56°, then find :
(a)
$\angle $
PST (2 marks)
(b)
$\angle $
POS (2 marks)
(d)
$\angle $
POS (2 marks )
(d)
$\angle $
PRS (2 marks)
Answer
1
Parul Kohli
Subject: Math
, 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: Math
, 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: Math
, 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
$\angle ADC=130\xb0,find\angle BAC.$
Answer
2
1
2
3
4
5
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What are you looking for?

$\mathbf{39}\mathbf{.}\mathbf{}\u25b3ABCisarightangledtrianglewithAB\hspace{0.17em}=3cm.AcircleistouchingitssidesABandACwithcentreOanddiameterBD.BD=2cm.FindlengthofCD.\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}\left(A\right)1\left(B\right)\frac{3}{4}\phantom{\rule{0ex}{0ex}}\left(C\right)\frac{1}{4}\left(D\right)Noneofthese$

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 $\frac{A}{B}=\frac{p}{q}$, where HCF (p,q)=1, then the absolute value of (p-q) is

touches the inner circle is___

Q10. In figure $\angle $PQR = 100° where P, Q and R are points on the circle with centre O. Find $\angle $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.

18. In given figure ABC is an isosceles triangle with AB = AC and $\angle ABC=50\xb0$ find $\angle BDCand\angle BEC.$$\angle BDCand\angle BEC.$

Or

In the given figure O is centre of circle of radius 5cm.

If $OP\perp AB,OQ\perp CD;AB\parallel CD.AB=6cmandCD=8cm,determinePQ.$

7. If a point C lies between two points A and B such that AC=BC then prove that AC=$\frac{1}{2}$AB.

8 If the difference between two supplementary angles is 40$\xb0$ 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$\xb0$ 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 $\angle AOC=\theta ,\angle BOD=\alpha $ then prove that $\angle APC=\frac{\theta -\alpha}{2}$.

(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 $\angle $PST = 72° and $\angle $PSQ = 56°, then find :

(a) $\angle $PST (2 marks)

(b) $\angle $POS (2 marks)

(d) $\angle $POS (2 marks )

(d) $\angle $PRS (2 marks)

Prove the the perpendicular bisector of a chord of a circle passes through the centre of the circle.