Lesson Planning of PARTS OF CIRCLE
Students` Learning Outcomes
 Identify Center, radius, diameter and circumference of a circle.
 Draw a circle of given radius using compass and straightedge / ruler
Information for Teachers
 Circle: A circle is the set of all points equidistant from a central point.
 Arc: a curved line that is part of the circumference of a circle.
 Chord: a line segment inside a circle which joins two points of the circle with each other. (Which may not pass though center of circle?)
 Circumference: the total distance around the circle.
 Diameter: the line segment which joins the two points of circle by passing through the center of circle.
 Center of circle:the point from where all the points of circle are at equal distance.
 Pi (π): A number, 3.14152… that equal to the circumference / diameter of any circle.
 Radius: distance from center of circle to any point on it.
 Tangent of Circle: a line perpendicular to the radius that touches only one point on the circle.
Material / Resources
Writing board, chalk/marker, duster, Geometry box, pencil, rubber, paper, textbook, circular card pieces
Introduction
 Ask students the names of circular shape from daily life. (Cycle wheel, ring, and bangle)
 Tell them, in a cycle wheel where all wires meet called hub (center point) and the length of wires represents radius of the wheel (circle)
 The strip revolves around the wheel represents circumference of wheel.
 Roll out thread around the circular card and ask students to measure its length through scale.
 The measured length will be the circumference.
Development
Activity 1
Pair Work:

Activity 2

Sum up / Conclusion
 Radius, diameter and circumference only related to circle.
 Circumference is the total length of the circle.
 Tell them that diameter is twice of radius.
Assessment
 What is the relation between radius and diameter?
 Draw the following circles on board and ask:
 What is AB?
 What is KM?
 What is point A?
 Teacher involves students to solve exercise given at the chapter of textbook.
Follow up
 Ask students to draw circles on their worksheets.
 Ask them to identify the objects of circle at their home.
 Ask them to draw circles of different sizes with the help of pebbles and chalks on the board and soil.