Chapter 9 Class 9 Circles
Master Chapter 9 Class 9 Circles with comprehensive NCERT Solutions, Practice Questions, MCQs, Sample Papers, Case Based Questions, and Video lessons.
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Why Learn This With Teachoo?
Updated new NCERT Book - 2027 Exams.
In Chapter 9 Class 9 of NCERT, Circles, Theorems are extremely important, we have provided detailed explanation of the theorems of circles as well as NCERT Solutions of all questions and examples.
In this chapter, we will learn
- The basics - What is a circle, radius, diameter, arc, sector, segment, chord
- Then, we do some theorems, and related questions... like
- Equal chords subtends equal angle at the center, and its converse
- Perpendicular from center to a chord bisects the chord, and its converse
- Only 1 Circle can pass through 3 non-collinear points
- Equal chords subtend equal angles at the center, and its converse
- Angle subtended by an arc is double the angle subteneded at any other point
- Angles in the same segment of a circle are equal
- Then, we will learn what a Cyclic Quadrilateral is,
- And its property - Sum of opposite angles of cyclic quadrilateral is 180
In addition to this, we have solved all the NCERT questions of this chapter, including Extra questions (Ex 10.6 - Optional Exercise)
Click on a link below to start doing the chapter