Mathematics Circles Grade INTRODUCTION Objective : To identify some concepts of the circle such as centre, chord, diameter and radius Target group : Secondary level, Grade- Duration/Mode : 45 minutes/Student-centred CONTENTS Circles Diameter P Chord Concepts on Circle Quiz Q Circles A circle is the set of all points in a plane that are at a given distance from a given point The given point P is called the center of the circle and the given distance is called the radius of the circle Radius P Center Diameter A diameter is a line segment that connects two points on the circle and goes through the centre of the circle diameter A P B Central Angle A central angle is an angle whose vertex is the center of the circle A P Central Angle B Arc An arc is part of a circle connecting two points of the circle A Arc P B Sector A sector is a region contained by two radii and an arc A Sector P B Chord A chord of a circle is a segment whose end points lie on the circle chord C D Concepts on circle Chord C Central Angle Diameter D P A B Sector Arc Q Center Radius Quiz Choose the correct answer The longest chord of a circle is a A diameter B radius C segment Quiz Choose the correct answer The distance between the center and a point on the circle is called A diameter B chord C radius Quiz Choose the correct answer The part of a circle connecting two points of the circle is the A central angle B sector C arc Worksheet Click on each icon to get the activity worksheet The following URL is the starting place, feel free to search the Internet for other related information http://www.math.com/school/subject3/lessons/S3U1L6GL.html THANK YOU Quit Your answer is wrong! Try again! Congratulations ! Your answer is correct