Class 9 / CBSE Maths / Circles / Circles

Circles

Angle Subtended by a Chord at a Point You have already studied about circles and its parts in Class VI. Take a line segment PQ and a point R not on the line containing PQ. Join PR and QR (see Fig.

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Class 9 / CBSE Maths / Circles / Circles

Circles

Perpendicular from the Centre to a Chord Activity  Draw a circle on a tracing paper. Let O be its centre. Draw a chord AB. Fold the paper along a line through O so that a portion of the chord

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Class 9 / CBSE Maths / Circles / Circles

Circles

Equal Chords and their Distances from the Centre Let AB be a line and P be a point. Since there are infinite numbers of points on a line, if you join these points to P, you will get infinitely man

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Class 9 / CBSE Maths / Circles / Circles

Circles

Angle Subtended by an Arc of a Circle You have seen that the end points of a chord other than diameter of a circle cuts it into two arcs – one major and other minor. If you take two equal cho

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Class 9 / CBSE Maths / Circles / Circles

Circles

Cyclic Quadrilaterals A quadrilateral ABCD is called cyclic if all the four vertices of it lie on a circle (see Fig 9.18). You will find a peculiar property in such quadrilaterals. Draw sev

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