Lesson Plan of Classification of Figures according to Number of Sides
Subject Mathematics
Grade III
Students` Learning Outcomes
- Classify figures according to the number of sides as quadrilaterals (rectangles, squares) and triangles.
Information for Teachers
- A triangle has three sides and three vertices.
- A quadrilateral has four sides and four vertices.
- While teaching the lesson, also consult textbook where and when applicable.
Material / Resources
Writing board, chalk/ marker, duster, cutouts of triangles, square and rectangle, meter ruler, textbook
Introduction
- Show cutouts of triangle to the students and ask them to count its sides and vertices.
- After taking their responses, show another types of triangles and ask to count its sides and vertices.
- Is there any difference in the number of sides and vertices of both triangles?
- Conclude to them that a three-sided shape is called triangle.
- A triangle has three sides and three vertices.
- Now show cutout of rectangle to the students and ask them to count, how many sides and vertices it has?
- After taking their response, tell them that it has four sides and four vertices.
- Show them cutout of square and they will count the number of sides and vertices.
- Ask the students, is there any difference in the number of sides and vertices of rectangle and square.
Development
Activity 1
- Draw three points on the board and ask the students to copy on their notebooks and join these points to make a shape.
- Ask the students about the name of shape (triangle) and the number of line segments.(3)
- Demonstrate to the students that a triangle has three sides AC, BC and AB and three vertices A,B and C.
Activity 2
- Demonstrate the drawing of quadrilaterals to the students on the board.
- Mark four points on the board and join them to make a quadrilateral. Tell the students that the sides of quadrilateral can be of any length.
- Ask from students to draw quadrilaterals on their own.
- Check the result and ask them to identify squares and rectangles from these quadrilaterals.
- Ask from students, that rectangle and square are the examples of quadrilateral. Why?
Activity 3
- Demonstrate the concept of type of quadrilaterals as rectangle and square to the students.
- Draw square and rectangle on the board.
- Ask from students, what is the difference between rectangle and square.
- After taking their response, explain to them that rectangle has equal opposite sides, whereas a square has four equal sides.
- Draw the following chart on the board; now call the students one by one to measure the lengths of the sides of the rectangle and square. Put their results in the table.
Sum up / Conclusion
- A triangle has three sides and three vertices.
- A quadrilateral has four sides and four vertices.
- Rectangle and square are example of quadrilaterals.
Assessment
- What is the difference between these three figures?
Follow up
- Draw following figures on board and student draw these on their copies.
- Ask them to put tick on the quadrilaterals and x on the others.
- Ask the students to solve the questions given in the textbook.
