Lesson Planning of Geometry Elements

 

Lesson Planning of Geometry (Recognize point, Line segment, ray)

Subject Mathematics

Grade 3^rd

Students` learning outcomes

• Recognize point, line segment, and ray

Information for Teachers

• In Geometry the point is a fine dot that represents a definite position or location.
• The line which joins two points is called line segment.
• If we extend a line segment from one end in a particular direction, it is called a ray.
• While teaching the lesson, the teacher should also consult textbook at all steps wherein and whenever it is applicable.

Material / Resources

Writing board, chalk/marker, duster, torch / toy laser light, pencil, sharpener, sheets of paper

Introduction

• Ask the students to sharpen their lead pencils and mark a dot by the sharp tip of their lead pencils on the notebooks. Tell them that this dot is called point.
• Ask them to mark one more point on the paper and ask how they will distinguish these two points.
• After collecting responses, tell them that to distinguish different points, we give them names using capitals letters, such as A, B, C. these points are read as point A, point B, point C.

Development

Teaching Approach

Demonstration method, Assignment method

• Let`s do some activities

Activity 1 Ask the students to put five or six points on the paper with the sharp tip of their pencils. Also name these points using capital letters.

 

Activity 2 Mark Point A and Point B on the board. Demonstrate to the students that we can join these two points in three different ways. Ask them what to identify the shortest way from A to B. They should say option C. After taking their response, elicit that the straight line which joins the two points is called line segment. In this example the line segment is denoted by  image Ask the students that how may end points it has? After taking their response tell them that it has two end points A and B. explain them that we can measure the length of a line segment. Make three pairs of points on the board and ask the students to copy and join these pairs of points. Also name the resulting line segments.

 

Activity 3 Draw the following points on the board and ask any student to join these points. Ask the students to name the shape that the student has drawn. Ask them that how many line segments are there in the shape and also name all the line segments. Ask the students, to draw a rectangle on their notebooks and tell that how many points and line segments a rectangle has? After taking their response, tell them that a rectangle has four points and four line segments.

 

Activity 4 Demonstrate the concept of ray by making a beam with a laser light or torch in the class.  Students will observe that torch ray starts at one point and goes endlessly in a direction. Ask the students can we make a ray on the board? Demonstrate to them that when a line segment is extended in a direction without stopping anywhere it is called a ray. It is denoted by

 

• .Ask the students how many end points a ray has? (Expected answer would be as; One)
• A is the end point of this ray, because it I the starting point B in the point through which we can extend this ray, so it is not an end point.
• Ask the students to draw these rays on their notebooks and name them.

 

• Tell the students that we can`t measure the length of a ray, because it has only one end and we can’t write 

 

 

Activity 5 Ask the students to do practice pages give in their Mathematics book.

 

• In Geometry the point is a fine dot that represents a definite position or location.
• The straight line which joins two points is called line segment.
• If we extend a line segment endlessly from one end in a particular direction, it is called a ray.

Assessment

• Draw line segments  XY and EF

 

 

• Draw rays AB and EF
• Teacher is required to involve the students in solving the problems given in the exercise at the end of unit/chapter.

Follow up

• How many points and line segments are there in a circle?