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What is irrational number's

Posted by Ketan Nagar 8 years, 3 months ago

CBSE > Class 09 > Mathematics

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Prajwal Dhiman 8 years, 3 months ago

No. Which are non terminated & not repeating eg. 121121112....???

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Materially e.g. heavy end

Posted by Shipments Singh 8 years, 3 months ago

CBSE > Class 09 > Mathematics

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How we should justify construction

Posted by Nikhil Sehrawat 8 years, 3 months ago

CBSE > Class 09 > Mathematics

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Verify if -3 and 4 are zeroes of the polynomial 2x^3-3x^2-23x-12.If yes then factorize the polynomial

Posted by Deepankar Juyal 8 years, 3 months ago

CBSE > Class 09 > Mathematics

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If p = 2 a, then prove that

Posted by Aanchal Kumari 8 years, 3 months ago

CBSE > Class 09 > Mathematics

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Write fifth postulate of Euclid geometry with example...

Posted by Piyush Gautam 8 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Shreya Yavari 8 years, 3 months ago

If a straight line falling on two straight lines makes the interior angles on the same side of it taken together less than two right angles , then the two straight lines,if produced indefinitely meet on that side on which the sum of angles is less than two rt angles .

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If a pair of sides of a cyclic quadrilateral are equal then prove that their diagonals are also equal

Posted by Sargam Kakkar 8 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Anuska Thakur 8 years, 3 months ago

Given: Cyclic quadrilateral ABCD such that AD = BC To Prove: AB parallel to CD Construction: Join BD Proof: Given that AD = BC Arc DA = Arc BC ∠2 = ∠1 [Equal chords subtend equal angles at the circumference of the circle] The angles ∠1and ∠2 are alternate interior angles. Therefore, AB is parallel to CD.

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Parallelogram on the same base and between the same parallel are equal in area prove it

Posted by Shashank Nautiyal 8 years, 3 months ago

CBSE > Class 09 > Mathematics

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Khushi Singh 8 years, 3 months ago

Let's take two parallelogram ABCD and EFCD on the same base DC and between same parallels AF and DC..........to prove=(ABCD=EFCD)...............in ∆ADE and ∆BCF,angleDAE=angleCBF(corresponding angles from AD //BCand transversa AF).................angleAED=angleBFC(corresponding angles from ED//DC and transversal AF).....therefore,angleADE=angleBCF(angle sum property of triangle)...also,AD=BC,hence∆ADEis congruent to∆BCF(ASA rule)....... therefore,ar(ADE)=at(BCF)....now,ar(ABCD)=at(ADE)+ar(EDCB)=ar(EFCD).........hence proved that ar(ABCD)=ar(EFCD)

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Ex 10.6

Posted by Shivam Gupta 8 years, 3 months ago

CBSE > Class 09 > Mathematics

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Two circles of radii 10 cm and 8 cm interest at two points and the length of the common chord is 12 cm . Find the distance between their centre

Posted by Rajeev Kumar 8 years, 3 months ago

CBSE > Class 09 > Mathematics

3 answers

Khushi Singh 8 years, 3 months ago

You now have four right triangles formed by the radii of each circle with the perpendicular drawn from each center point to the chord of intersection, we will use one triangle from each circle OB = 8, BI = 6, find OI by Pythagorean Theorem BI2 + OI2 = OB2 36 + OI2 = 64 OI2 = √ 28 OI = 5.292 -------------------------------------------------------------- BP = 10, BI = 6, find PI This is a 3 - 4- 5 right triangle: 6, PI = 8, 10 -------------------------------------------------------------- Therefor the distance between the centers: PO = OI + BI PO = 5.292 + 8 PO = 13.29

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Anand Raj 8 years, 3 months ago

13.3

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Khushi Singh 8 years, 3 months ago

12 cm

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Two

Posted by Rajeev Kumar 8 years, 3 months ago

CBSE > Class 09 > Mathematics

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when xraisedpower3minustwicexsquareplusaxminus b is divided by xsquare minus twice x minus 3, remainder is x minus 6 find a and b

Posted by Salmana Noorain 8 years, 3 months ago

CBSE > Class 09 > Mathematics

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Define chord.

Posted by Mehak Sharma 8 years, 3 months ago

CBSE > Class 09 > Mathematics

2 answers

Account Deleted 8 years, 3 months ago

Hi. A chord is a straight line from one end of the circumference to another end.... A diameter is the longest chord....

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Anand Raj 8 years, 3 months ago

a straight line segment joining and included between two points on a circle

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What is differences between line and straight line

Posted by Shailendra Kumar 4 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Sia ? 4 years, 9 months ago

A line can be straight or curved. In geometry, the word line means a straight line. A straight line is the shortest distance between two points. A straight line is the line traced by a point moving in a direction that does not change.

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Article on more adds then news

Posted by Asmita Singh 8 years, 3 months ago

CBSE > Class 09 > Mathematics