# Line(s) of Symmetry I (Primary 3)

Last Updated on July 15, 2020 by Alabi M. S.

MATHEMATICS

SMASE – ASEI PDSI METHOD

THIRD TERM

WEEK 8

PRIMARY 3

TOPIC: Symmetry

LEARNING AREA

• Lesson One – Properties of Triangle, Square, Rectangle and Circle
• Lesson Two – Line (s) of Symmetry – Triangle and Square
• Lesson Three – Line (s) of Symmetry – Rectangle and Circle
• Lesson Four – Revision
• Lesson Five – Quantitative and Test

TIME – 40 Minutes each.

LEARNING OUTCOME – 8

By the end of the lesson, pupils should be able to:

1. identify shapes with line(s) of symmetry.
2. identify lines of symmetry in everyday life.
3. state properties of squares, rectangles and triangles.
4. identify that some shapes in everyday life are square, rectangular, triangular and circular and therefore see mathematics in everyday life.

RATIONALE

We can find if a shape has a Line of Symmetry by folding it. When the folded part sits perfectly on top (all edges matching), then the fold line is a Line of Symmetry. A circle has infinite lines of symmetry. Likewise, a triangle has three lines of symmetry, while rectangle and square have four such lines which divide them into identical parts.

The concept of this lesson (line (s) of symmetry) will enable pupils to recognise and identify the properties of squares, rectangles and triangles: number of sides, corners, lines of symmetry, equal line, square corners, etc.

LEARNING MATERIALS

The teacher will teach the lesson with the aid of Plane shapes, Leaves, Pictures, Squares, Rectangles, Triangles, Rulers, Pencil, Broomsticks, Straight edges, Square cornered shapes, Circular tins, Coins etc.

PREVIOUS KNOWLEDGE

Nobody want to be cheated. Share things equally are top priority. As for the adults, the little children want as much as their elder, even as their parents. Sometimes, they don’t want to be lap in the bus. They want to sit comfortably. They also want to draw boundary (line) to indicate their portion.

REFERENCE MATERIALS

1. 9 – Years Basic Education Curriculum
2. Lagos State Scheme of work
3. New Method Mathematics Book 6
4. All Relevant Materials
5. Online Materials