Third Term Lesson Note for Week
Class: Primary 5
Subject: Mathematics
Topic: Plane Shapes (Identification and properties)
Duration : 80 minutes
Period : Double Periods
Reference Book :
- New Method Mathematics for Primary Schools, Book 5.
- Lagos State Unified Schemes of Work for Primary Schools (Primary 4 – 6).
- Online Resources
Instructional Material : Chart showing examples of plane shapes and their properties.
Learning Objectives : By the end of the lesson learners will be able to :
i. Define plane shapes and give examples
ii. State the properties of each plane shapes
Content :
Plane Shapes are shapes in a two dimensional. There are different types of plane shapes. Some have three sides while some have four sides.
Examples are parallel lines, perpendicular lines, triangle, Quadrilaterals and polygons
1. Parallel lines are two straight lines that are always the same distance apart.
A —————–>—————— B
X ——————>—————— Y
2. Perpendicular lines are two lines that are at right angles to each other.
3. Triangles: These are two dimensional shapes that has three sides and three angles.
There are different types of triangles. These are:
a.) Isosceles triangle : is a triangle in which two sides and two angles are equal. It has one line of symmetry.
b.) Equilateral triangle : is a triangle in which all the three sides and angles are equal. It has three lines of symmetry.
c.) Right-angles triangle : is a triangle in which one of its angle is at 90°. It has no line of symmetry.
d.) Scalene triangle is a triangle in which all the three sides are not equal and all the three angles are not equal. It has no line of symmetry.
4. Quadrilaterals : These are two – dimensional shape that has four sides and four angles. Examples of quadrilateral are square, rectangle, trapezium, parallelogram, rhombus
Presentation Steps :
Step 1 : Revises the previous lesson with the learners by asking questions orally.
Step 2 : Introduces the new topic by explaining plane shapes and gives examples.
Step 3 : Describe each plane shapes listed above with their properties.
Evaluation :
1. A plane shape is a shape with ___________ dimensions. (a) three (b) two (c) five
2. A plane shape with three sides is called a _____________. (a) triangle (b) Quadrilaterals (c) polygon
3. A two dimensional shape with four sides is known as ________________. (a) polygon (b) triangle (c) quadrilaterals
4. Which of these is not an example of a Quadrilaterals? (a) Rectangle (b) Pentagon (c) Trapezium
5. A triangle in which all its side are equal is called _______________ triangle. (a) Scalene (b) Isosceles (c) Equilateral
6. An isosceles triangle has ________________. (a) Three equal sides (b) No equal sides (c) two opposite sides that are equal.
7. An equilateral triangle has _______ lines of symmetry. (a) 2 (b) 3 (c) 1
8. Which one of the triangles has one of it angle as 90° ? (a) Right angle triangle (b) Isosceles triangle (c) Equilateral triangle
9. There are ________ types of triangles. (a) 2 (b) 3 (c) 4
10. A triangle that has no line of symmetry is ________________ triangle. (a) Isosceles (b) Scalene (c) Equilateral
Assignment :
1.) What are plane shapes?
_______________________________________________________________________________________________________________________________________
2.) List four examples of plane shapes.
_____________________ ___________________
_____________________ ___________________
3.) A _______________ is a plane shape with three sides and three angles.
4.) Mention the types of triangles :
i. ________________________________________
ii. ________________________________________
iii. ________________________________________
iv. ________________________________________
5.) Quadrilateral are ____________________________________________________________________________________________________________________
6.) Give four examples of a quadrilateral.
_________________, _________________,
_________________, _________________.