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Asked/Added Questions From NCERT:


Question 1. Asked on :13 February 2019:10:06:57 AM

   Find the value of X

-Added by Akki chauhan Mathematics » Circles


Question 2. Asked on :05 February 2019:09:14:22 AM

 Which is the largest chord in circle.

-Added by Akki chauhan Mathematics » Circles

Answer:

Himanshi Verma

 Diameter is the greatest chord of circle.

-Answered by Himanshi Verma On 05 February 2019:04:58:06 PM


Question 3. Asked on :13 January 2019:11:15:32 AM

 Define concentric circles.

-Added by Akki chauhan Mathematics » Circles

Answer:

Akki chauhan

 The concentric circle are the circles with a common center the region between two concentric circle of different radii is called an annulus. 

-Answered by Akki chauhan On 15 January 2019:09:05:48 AM


Question 4. Asked on :12 January 2019:05:52:26 PM

prove that the cyclic parallelogram is rectangle. 

-Added by khushi chauhan Mathematics » Circles

Answer:

Akki chauhan

  ∠A + ∠C = 180 ....1

But ∠A = ∠C

So ∠A = ∠C = 90

Again 

  ∠B + ∠D = 180 ....2

But ∠B = ∠D

So ∠B = ∠D = 90

Now each angle of parallelogram ABCD is 90.

Hense ABCD is a rectangle

-Answered by Akki chauhan On 15 January 2019:09:05:05 AM


Question 5. Asked on :09 January 2019:09:54:18 AM

Prove that if the chords are equal then the subtend angle at the center are equal?

-Added by Master Purushottam Mathematics » Circles

Answer:

Akki chauhan

 

Given : In a circle C(O,r) , ∠AOB = ∠COD 

To Prove : Chord AB = Chord CD .

Proof : In △AOB and △COD 

AO = CO [radii of same circle]

BO = DO [radii of same circle]

∠AOB = ∠COD  [given]

⇒  △AOB ≅  △COD [by SAS congruence axiom]

⇒   Chord AB = Chord CD [c.p.c.t]

-Answered by Akki chauhan On 13 January 2019:01:04:33 PM


 

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