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Theorem 10.1 : Equal chords of a circle subtend equal angles at the centre. Proof : You are given two equal chords AB and CD of a circle with centre O (see Fig.10.13).
You have studied in Class IX that a circle is a collection of all points in a plane which are at a constant distance (radius) from a fixed point (centre). You have also studied various terms related to a circle like chord, segment, sector, arc etc.
Download Circles CBSE Class 9 Maths Chapter 9 notes PDF for free. Secure good marks by referring NCERT Class 9 Circles revision notes prepared by Vedantu experts.
NCERT Solutions for Class 9 Maths Chapter 10 Circles are provided here in PDF format, which can be downloaded for free. The NCERT Solutions for the chapter Circles are included as per the latest update of the CBSE curriculum (2023-24) and have been designed by our expert teachers.
NCERT Book Class 9 Maths Chapter 9 Circles is here. You can read and download Class 9 Maths Chapter 9 PDF from this page of aglasem.com. Circles is one of the many lessons in NCERT Book Class 9 Maths in the new, updated version of 2023-24.
Theorem of equal angles subtended by different chords. - If the ang les subtended by the chords of a circle at the center are equal, then the chords are equal.
Circle Theorems. circle is a set of points in a plane that are a given distance from a given point, called the center. The center is often used to name the circle. –T. This circle shown is described an OT. As always, when we introduce a new topic we have to define the things we wish to talk about.
