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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,
$\u25b3ABC~\u2206ADE.$
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
$\angle AOB=90\xb0$
.
Answer
1
Saksham
Subject: Maths
, asked on 4/2/18
Solve this:
Answer
3
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
$16.Infigure,APandBPare\mathrm{tan}gentstoacirclewithcentreO,suchthatAP=5cmand\angle APB=60\xb0..FindthelengthofthechordAB.\phantom{\rule{0ex}{0ex}}$
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.
$iv)TangentBC\hspace{0.17em}touchesthecircleatthepointA,ifADisachordsuchthatm(arcAD)=100\xb0thenfindthemeasureof\angle CAD.$
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
$\angle POQ+\angle QPO$
.
Answer
2
Shrish Vaidya
Subject: Maths
, asked on 1/2/18
$25.Sevenyearsago,Raghav\text{'}sagewasfivetimesthesquareofNatima\text{'}sage.Afterthreeyearsfromnow,Natima\text{'}sage\phantom{\rule{0ex}{0ex}}willbe\frac{2}{5}timesoftheageofRaghav.FindthedifferencebetweentheagesofRaghavandNatima.\phantom{\rule{0ex}{0ex}}27.Two\mathrm{tan}gentsABandACaredrawntoacirclewithcentreOsothat\angle BAC=120\xb0.ProvethatOA=2AB.$
Answer
6
Shishira
Subject: Maths
, asked on 31/1/18
Q. Find the area of shaded region . If BC = 4 cm and AB = 5 cm.
Answer
2
Son Ser
Subject: Maths
, asked on 30/1/18
Plzz fast i have exams 2moro. Dont provide any link plzzzzz
Q. AB is the tangent.
$\angle ACB=2\xb0$
. Find
$\angle CAB$
when AC = AO = 1 cm.
Answer
3
Son Ser
Subject: Maths
, asked on 30/1/18
Plzz fast i have exams 2moro. Dont provide any link plzzzzz
$\angle ACB=20\xb0,AD=AC=10,ABisthe\mathrm{tan}gent.\phantom{\rule{0ex}{0ex}}Find\angle BAC$
Answer
1
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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, $\u25b3ABC~\u2206ADE.$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 $\angle AOB=90\xb0$.

I just want to ensure. See the question in the pic.

$iv)TangentBC\hspace{0.17em}touchesthecircleatthepointA,ifADisachordsuchthatm(arcAD)=100\xb0thenfindthemeasureof\angle CAD.$

Q.2. In figure, if PQ is a tangent, then find the value of $\angle POQ+\angle QPO$.

Q. AB is the tangent. $\angle ACB=2\xb0$. Find $\angle CAB$ when AC = AO = 1 cm.

$\angle ACB=20\xb0,AD=AC=10,ABisthe\mathrm{tan}gent.\phantom{\rule{0ex}{0ex}}Find\angle BAC$