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Third Term Mathematics Lesson Note for JSS1

ACCESS ALL QUESTIONS AND ANSWERS

ACCESS WAEC QUESTIONS AND ANSWERS

WEEK 1 REVISION OF SECOND TERM’S

WEEK 2 SIMPLE EQUATION

WEEK 3 GEOMETRY: PLANE SHAPES

WEEK 4 THREE DIMESIONAL SHAPES

WEEK 5 IDENTIFICATION AND PROPERTIES OF ANGLES

WEEK 6 THEOREMS

WEEK 7 REVIEW OF FIRST HALF TERM’S

WEEK 8 CONSTRUCTION

WEEK 9 STATISTICS

WEEK 10 STATISTICS

WEEK 11 REVISION

WEEK 12 EXAMINATION

WEEK 1

TOPIC: SIMPLE EQUATION

This expression 3 x p= 18 is an algebraic sentence. It means three times an unknown numbers is equal to eighteen.

Translate the following equations into words.

5x + 7 = 37 it means if 7 is added to five times a number, the result is 37

11 = 3x – 1. It means 11 is equal to 3 times a certain number minus one.

TRUE AND FALSE STATEMENT

EXAMPLES: State whether the following is true or false

1. X + 8 = 15 ( when x is 7)

2. 3x – 4 = 11 ( when x is 6)

Solution

X + 8 = 15

7 + 8 = 15. Therefore the statement is true.

Solution

3x – 4 = 11

3*6 – 4 = 11

18 – 4 = 14 therefore the statement is false.

LINEAR EQUAUTION WITH MIXED OPERATION AND COLLECTION OF LIKE TERMS

When the operation are more than one,

a. Eliminate the unwanted terms by either adding or subtraction

b. Then eliminate the co efficient of the unknown by either multiplying or dividing.

Examples

1. 4y – 5 = 7

Solution

Add 5 to both sides

4y -5 + 5 = 7 + 5

4y = 12

Divide both sides by the coefficient of the unknown

4y/4 = 12/4

Y = 3

2. 5x -10 = 15x -60

Solution

5x – 10 = 15x – 60

Collect the like terms

5x -15 x = -60 + 10

-10x = -50

Divide both sides by -10 (Coefficient of the unknown)

-10x/-10 = -50/ -10

X = 5.

Do these

Solve the following equation

1. 6m + 2 = 20 + 5m

2. 4c – 8 = 10 – 5c

3. 5x +5 = 35+ 2x

4. 56 +7y = 5y + 16

ASSIGNMENT: Page 151 Exercise 14.6 (Nos 1, 5,15,21,31 and 38) and PAGE 153 EX 14.8 NO 2 (a,b,c and d) NO 3 (a,b,c and d)

WEEK 2:

TOPIC: GEOMETRY (PLANE SHAPES AND THEIR PROPERTIES)

There are two types of plane shapes

Regular and Irregular shapes.

1. TRIANGLES: Triangles is a three sides plane shapes with three angles.

Types and Properties of Triangles

Equilateral Triangles

Triangles with all three sides equal in length and all three angles equal in magnitude, are called equilateral triangles. Since the angles in a triangle sum to 180° and the size of each angle is the same in an equilateral triangle, the angles are all 60°.

Isosceles Triangles

Isosceles triangles are triangles with two sides equal in length and two angles equal in magnitude.

Scalene Triangles

A scalene triangle is one which has no sides equal in length and no angles equal in magnitude.

Right-Angled Triangles

Right-angled triangles are triangles with one of their angles equal to 90° (i.e. a right angle).

QUADRILATERALS

Quadrilateral just means “four sides” (quad means four, lateral means side).A Quadrilateral has four-sides, it is 2-dimensional (a flat shape), closed (the lines join up), and has straight sides.

Types of Quadrilaterals

There are special types of quadrilateral:

Some types are also included in the definition of other types! For example a square, rhombus and rectangle are also parallelograms.

TYPES AND PROPERTIES OF QUADRILATERALS

Quadrilaterals are any four-sided figure, joined by four straight lines, that is, Quadrilaterals are four-sided polygons.

Properties of Quadrilaterals:

-Four sides.

-Four vertices (corners).

-Interior angles sum to 360^°.

-Exterior angles sum to 360^°.

Things to Know:

-Diagonals are line segments that join two opposite vertices (corners).

Third Term Mathematics Lesson Note for JSS1

The term “square” can be used to mean either a square number (“ is the square of “) or a geometric figure consisting of a convex quadrilateral with sides of equal length that are positioned at right angles to each other as illustrated above. In other words, a square is a regular polygon with four sides.