# 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:

1. identify symmetrical plane shapes.
2. locate line(s) of symmetry of objects in the school and homes.
3. distinguish between horizontal and vertical lines.
4. 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:

1. Plane shapes
2. Charts.
3. 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

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

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