Plane Shapes (Primary 4) – Lines of Symmetry, Horizontal and Vertical Lines, Types of Angles
MATHEMATICS
SMASE – ASEI PDSI METHOD
THIRD TERM
WEEK 7
PRIMARY 4
TOPIC: Lines of Symmetry and Angles
LEARNING AREA
 Lesson One – Lines of Symmetry I – Triangles
 Lesson Two – Lines of Symmetry II – Quadrilateral
 Lesson Three – Horizontal and Vertical Lines
 Lesson Four – Angles
 Lesson Five – Cardinal Points
TIME – 40 Minutes each.
LEARNING OUTCOME
By the end of the lesson, pupils should be able to:
 identify symmetrical plane shapes.
 locate line(s) of symmetry of objects in the school and homes.
 distinguish between horizontal and vertical lines.
 indicate the four cardinal points and relate the setting and rising of the sun on the cardinal points of the East and West.
RATIONALE
If you can reflect (or flip) a figure over a line and the figure appears unchanged, then the figure has reflection symmetry or line symmetry. The line that you reflect over is called the line of symmetry. A line of symmetry divides a figure into two mirror – image halves. Angles are when two or more lines meet or intersect. The space between two lines is called an angle. Cardinal points are direction – North, South, East and West
In this lesson, the pupils will identify lines of symmetry of any shapes and also identify different types of angles and locations of places.
LEARNING MATERIALS
The teacher will teach the lesson with the aid of:
 Plane shapes
 Charts.
 Chart and model of the four cardinal points.
PREVIOUS KNOWLEDGE
Lines of symmetry divide shapes into two similar shapes. Angles are the space between two intersect lines.
REFERENCE MATERIALS
 9 – Years Basic Education Curriculum
 Lagos State Scheme of work
 New Method Mathematics Book 6
 All Relevant Materials
 Online Materials
LESSON PLAN/DEVELOPMENT
ASEI PDSI LESSON NOTES

LESSON DEVELOPMENT 1 – LINES OF SYMMETRY – TRIANGLES

LESSON DEVELOPMENT 2 – LINES OF SYMMETRY – QUADRILATERALS

LESSON DEVELOPMENT 3 – HORIZONTAL AND VERTICAL LINES

LESSON DEVELOPMENT 4 – TYPES OF ANGLES

LESSON DEVELOPMENT 5 – CARDINAL POINTS