Line(s) of Symmetry I
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:
 identify shapes with line(s) of symmetry.
 identify lines of symmetry in everyday life.
 state properties of squares, rectangles and triangles.
 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
 9 – Years Basic Education Curriculum
 Lagos State Scheme of work
 New Method Mathematics Book 6
 All Relevant Materials
 Online Materials
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LESSON PLAN/DEVELOPMENT
ASEI PDSI LESSON NOTES

LESSON DEVELOPMENT 1 – PROPERTIES OF TRIANGLE, SQUARE, RECTANGLE AND CIRCLE

LINE(S) OF LINE OF SYMMETRY – TRIANGLE AND SQUARE

LESSON DEVELOPMENT 3 – LINE(S) OF LINE OF SYMMETRY – RECTANGLE AND CIRCLE