In Chapter 10 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