Lesson Plan Math Class X (Ch- 12) | Area Related to Circle

E- LESSON PLAN   SUBJECT MATHEMATICS    CLASS 10

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TEACHER'S NAME :    DINESH KUMAR	SCHOOL :   RMB DAV CENTENARY PUBLIC SCHOOL NAWANSHAHR
SUBJECT   :   MATHEMATICS	CLASS                  :   X  STANDARD BOARD                 :  CBSE
LESSON TOPIC / TITLE   :  CHAPTER 12:   AREA RELATED TO CIRCLE	ESTIMATED DURATION:  This topic is divided into seven modules and are completed in seven class meetings.

PRE- REQUISITE KNOWLEDGE:-

• Basic knowledge of plane figures like circle triangle and quadrilateral class VIII and IX .
• Properties of circle and cyclic quadrilateral.

TEACHING AIDS:-  

Green Board, Chalk,  Duster, Charts and model of circle etc.

METHODOLOGY:-  

Lecture method, Demonstration and Learning by doing 

LEARNING  OBJECTIVES:-

• Introduction and definitions related to the circle, radius, diameter, chord, segment, sector, circumference etc.

• Circumference and perimeter of the circle, semi-circle, quadrant and length of arc.

• Area of circle, minor-sector, major-sector, minor- segment, major-segment etc.

• In calculating area of segment of a circle, problems should be restricted to central angle of  60^o, 90^o, 120^o.

• Area related to the other plane figures like triangles and quadrilaterals should be taken.

• Problems based on the combinations of plane figures: circle, triangle and quadrilateral should taken and discussed thoroughly.

LEARNING  OUTCOMES:-

After studying this lesson students should know 

• The circle and its components. 
• The area and perimeter related to all the plane figures like circle, semi-circle, quadrant, segment, sector, different types of triangles and different types of quadrilaterals. 
• Method of solving the problems of plane figures in combination form.

RESOURCES

NCERT Text book of Mathematics

NCERT Exemplar Text Book

RESOURCE CENTRE at cbsemathematics.com

DAV Resource Material for class 10

KEY WORDS :

Sector, Segment, Diameter, Radius, Central Angle, Hexagonal

PROCEDURE :-

Start the session by checking the  previous knowledge of the students, by asking the questions about radius, diameter, chord, segment, sector etc. After this introduce the topic area related to the circle(plane figures) step by step as follows. 

S.NO.	TOPIC [For Complete Explanation]
1	Introduction Circle, triangle quadrilateral and other polygons are two dimensional figures. So these figures are called plane figures. In this chapter we will discuss the area related the plane figures and combinations of plane figures.  First of all teacher will define all the terms which are related with the circle, like definitions of  Circle, centre of the circle, radius, diameter, chord, segment, sector, minor segment, major segment, minor sector, major sector, semicircle, quadrant and circumference of the circle.
2	Circumference and perimeter Now teacher will explain different properties of circle to the students and explain the difference between the circumference and perimeter of the circle. Length of curved surface is called circumference and length of the boundary is called perimeter. In case of circle circumference and perimeter both are same. But in semi-circle both are different.
3	Now teacher will explain the formula and method of finding the circumference and perimeter of the circle, semi-circle and quadrant. Circumference of semi-circle = 𝞹r Perimeter of semi-circle = 𝞹r + 2r Perimeter of quadrant of circle = (1/2)𝞹r + 2r
4	Area of Segment and Sector Now teacher will explain the formula and method of finding the area of the circle, semi-circle, quadrant, minor segment, major segment, minor sector, major sector all with central angle 60o, 90o, 120o Also help the students in the implementations of all these formulas. Area of circle   Area of minor sector   Area of major sector =  Area of minor segment =   Area of major segment =   Area of Quadrant =
5	Now explain the area related to different types of triangles and their implementations in different problems. Area of triangle,  right angled triangle,  equilateral triangle and scalene triangle.  Area of triangle =  Area of equilateral triangle =
6	Area of Quadrilaterals Now teacher will explain the area related to different types of quadrilaterals  and their implementations in different problems. Area of trapezium, parallelogram, rectangle, rhombus and square. Area of quadrilateral =  Area of parallelogram =  Area of rectangle =  Area of rhombus =  Area of square =
7	Now teacher will introduce the topic combination of different plane figures and explain the topic by taking different examples.
8	Angle made by minute and hour hand of the watch. Here teacher will explain the  angle made by minute hand in one minute = 6o  and angle made by hour hand in one minute = ( ½)o Teacher will also explain the topic by taking some examples
9	Regular Hexagon Teacher will explain the concept of regular hexagon and method of finding its area. A regular hexagon can be divided into six equilateral triangles. So  Area of regular hexagon = 6 X Area of equilateral triangle.

STUDENTS DELIVERABLES:-

• Review questions given by the teacher. 
• Students can prepare a presentation on the formulas related to the plane figures.
• Solve N.C.E.R.T. problems with examples.
• Solve assignment given by the teacher.

EXTENDED LEARNING:-

Students can extend their learning through the RESOURCE CENTRE and can find more valuable and interesting concepts on mathematics at  cbsemathematics.com

ASSESSMENT TECHNIQUES:-

Assignment sheet will be given as home work at the end of the topic. Separate sheets which will include questions of logical thinking and Higher order thinking skills will be given to the above average students.

Class Test , Oral Test , worksheet and Assignments. can be made the part of assessment.

Re-test(s) will be conducted on the basis of the performance of the students in the test.

FEEDBACK:

All those students who performed well will be appreciated positively, and all those who can not perform up to the mark will again be given some important tips, guidance and  positive motivation to go through the topic again and then re-evaluated again. If possible then provision of remedial classes can be made for batter results.

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