CH-10 CIRCLES

6. – A line segment joining any two points on a circle is called a chord.
8. – A part of the circumference of a circle is called an arc.
9. – A chord passing through the centre of the circle is called the diameter.
11. – The line drawn through the centre of a circle to bisect a chord is perpendicular to the chord.
12. – The fixed point inside a circle is called the centre.
13. – The perpendicular from the centre to a chord divides the chord into two equal parts.
14. – The properties of chords help solve problems related to circles and their theorems.
15. – The distance of a chord from the centre is the length of the perpendicular drawn from the centre to the chord.
16. – A circle is a set of all points in a plane that are at the same distance from a fixed point called the centre.

1. – Equal chords of the same circle are equidistant from the centre.
2. – The perpendicular drawn from the centre of a circle to a chord bisects the chord.
3. – Equal chords of a circle subtend equal angles at the centre.
4. – Chords that are equidistant from the centre of a circle are equal in length.
5. – Circles having equal radii are called congruent circles.
7. – The line segment joining the centre of a circle to any point on the circle is called the radius.
10. – Circles having the same centre but different radii are called concentric circles.