This document is a textbook that provides basic facts about circles for 8th standard students. It defines key circle terms such as radius, chord, diameter, tangent, arc, and sector. Definitions and diagrams are given for each term along with links for further information. The textbook was prepared by Dhanya S. Vijayan for mathematics students at KUCTE, Kulakkada.

1. BASIC FACTS OF CIRCLE
FOR
VIII STANDARD STUDENT

2. PREFACE
This is a text book for viii standard students for studying
the BASIC FACTS ABOUT CIRCLES. It includes presentation slides for
fostering their interest towards geometry . Also attach search links for more
information.

3. PREPARED BY
DHANYA S. VIJAYAN
MATHEMATICS
KUCTE , KULAKKADA

4. CIRCLE
CIRCLE IS A COLLECTION OF POINTS WHICH ARE EQUIDISTANT FROM A GIVEN POINT IS CALLED A
CIRCLE
Circle - Wikipedia, the free encyclopedia
Definition of Circle - Math is Fun
Circle - Definition and More from the Free Merriam-Webster ...

5. RADIUS
Distance from center of circle to any point on it is called the radius
o
radius
Radius of a circle - math word definition - Math Open .
How to Calculate the Radius of a Circle: 11 Steps (with ...
radius of a circle എന്നതിനുള്ള ചിത്തങ്ങള്‍

6. CHORD
A line that links two points on
a circle
A B
P Q
C D
Chord - Math word definition - Math Open Reference
Chord (geometry) - Wikipedia, the free encyclopedia
chord of a circle എന്നതിനുള്ള ചിത്തങ്ങള്‍

7. DIAMETER
The longest distance from one end of a circle to the
other.
o
Diameter
Diameter - math word definition - Math Open Reference
3 Ways to Calculate the Diameter of a Circle - wikiHow
diameter of a circle എന്നതിനുള്ള ചിത്തങ്ങള്‍

8. TANGENT
A line that contacts an arc or circle at only
one point.
Tangent to a circle definition - Math Open Reference
Tangent - math word definition - Math Open Reference
Tangent lines to circles - Wikipedia, the free encyclopedia
tangent of a circle എന്നതിനുള്ള ചിത്തങ്ങള്‍

9. ARC OF A CIRCLE
A connected section of the circumference of a circle
Mathwords: Arc of a Circle
Arc (geometry) - Wikipedia, the free encyclopedia
Circles and Arcs - Regents Exam Prep Center
arc of a circle എന്നതിനുള്ള ചിത്തങ്ങള്‍

10. SECTOR
A part of the interiorof a circle bounded by two radii and an arc.
Mathwords: Sector of a Circle
Circular sector - Wikipedia, the free encyclopedia
Area of a sector of a circle - Math Open Reference
What is the Formula for the Area of a Sector of a Circle ...
SECTOR of a circle എന്നതിനുള്ള ചിത്തങ്ങള്‍