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• CBSE×
• Class 9×
• Mathematics×
• Circles×
• Introduction To Circles×

Introduction To Circles Free Doubts and Solutions

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prove that the circle drawn with any side of a rhombus as diameter passes through the point of intersection of its diagonals

Asked by jhmukherjee94 8th March 2016, 10:35 PM

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a circle divides the plane on which it lies in 3 parts . how ? please explai

Asked by daglipriya 19th February 2016, 10:04 PM

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How do we prove the following theorem step by step:- 1.if two arcs of a circle are congruent , then the corresponding chords are equal. 2. If two chords of a circle are equal, then their corresponding arcs are congruent.

Asked by nikhil 28th January 2016, 3:51 PM

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1. what is the sum of all digits of all the integers from 1 to 1000000 ? 2. a triangle with sides 5 , 12 and 13 has both an inscribed and a circum-scribed circle . what is the distance beween the centers of those circle ? 3. let x and y be two digit integers such that y is obtained b reversing the digits of x . suppose x and y also satisfies xsq.-ysq. =msq.  for some positive integers m . what is the value of m+x+y ?

Asked by dkvyas2005 21st January 2016, 11:16 PM

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Prove that the quadrilateral formed by the internal angle bisectors of any quadrilateral is cyclic ?

Asked by shub3893 4th December 2015, 9:04 PM

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qus 1 - show me by fig. how a circle divides the plane, on which it lies in three parts.       qus2- prove that if the bisector of any angle of a triangle and the perpendicular bisector of its opposite side intersect, they will intersect n the circumcircle of the triangle.                               plzzzzzzz........ give me the sol of this ques with concept of main topic of this ques     qus 3 - if O is the centre of a circle of a circle of radius r and AB is a chord of the circle at a distance r/2 from O, then find angle BAO.     qus 4 - Let C be the mid point of arc AB of a circle such that m arc AB = 183 degree. if the region bounded by the arc ACB and line segment AB is denoted by S, then where centre O of the circle lies?   qus 5 -If A and B are two points on acircle such that m( arc AB) = 260 degree. find A possible value for the angle subtended by an arc BA at a point on the circle.   qus 6 - if AB is a chord of a circle , P and Q are the two pints on the circle different from A and B, then prove that  angle APB+ angle AQB = 180 degree or angle APB= angle AOB.   qus 7 -If ABC is arc of acircle and angle ABC = 135 degree, then prove that the ratio of arc ABC to the circumference is 1:4.

Asked by Varsha 24th January 2015, 8:40 PM

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This is the plan of jillian's square garden. All the curved lines in the plan are parts of circles. The pond is quater circle The centre of the garden is at O.                           plan of garden What is the area of the grass , to the nearest ?

Asked by shivbajaj_bkn 12th September 2014, 6:49 PM

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CBSE - IX - Mathematics - Circles

Asked by Topperlearning User 4th June 2014, 1:23 PM

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Two circles intersect at two points A and B. AD and AC are diameters to the two circles. Prove that B lies on the line segment DC.

Asked by Topperlearning User 4th June 2014, 1:23 PM

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Prove that the angle subtended by an arc at the centre is double the angle subtended by it at any point on the remaining part of the circle.

Asked by Topperlearning User 4th June 2014, 1:23 PM

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Draw a circle with radius 2.1 cm. Draw three chords of the circle such that they form an equilateral triangle.

Asked by Topperlearning User 4th June 2014, 1:23 PM

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Draw a circle whose diameter is 4 cm. Mark the points P, Q, and R in the interior, exterior and on the circle respectively.

Asked by Topperlearning User 4th June 2014, 1:23 PM

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Draw a line segment AB of length 4.8 cm. Construct two semi-circles on opposite sides of AB such that half the length of AB is the diameter of each of the semi-circles.

Asked by Topperlearning User 4th June 2014, 1:23 PM

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What is the difference between a chord and secant of a circle?

Asked by Topperlearning User 4th June 2014, 1:23 PM

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Define centre of a circle.

Asked by Topperlearning User 4th June 2014, 1:23 PM

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Three girls Reshma, Salma and Mandip are playing a game standing on a circle of radius 5m drawn in a park. Reshma throws a ball to Salma, Salma to Mandip, Mandip to Reshma. If distance between Reshma and Salma and between Salma and Mandip is 6m each, what is the distance between Reshma and Mandip?

Asked by Ranjana Mariyam Raju 10th March 2014, 7:50 PM

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CBSE - IX - Mathematics - Circles

Asked by Topperlearning User 16th December 2013, 8:12 AM

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Construct an isosceles triangle in a circle of radius 3 cm. Measure the length of the three sides.

Asked by Topperlearning User 16th December 2013, 7:59 AM

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Define sector of a circle.

Asked by Topperlearning User 16th December 2013, 7:55 AM