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

Answer:

Akki chauhan
(i) 55⁰

-Answered by Akki chauhan On 15 September 2019:11:03:28 AM

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:

Master Purushottam
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 Master Purushottam On 23 August 2019:11:34:12 PM

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:

Rahul Kumar

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

-Answered by Rahul Kumar On 13 October 2019:10:01:29 AM

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