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**Mathematics Lesson Notes JSS1 Third Term**

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**Scheme Of Work**

**Week One: REVISION OF SECOND TERM’S WORK**

**Week Two: SIMPLE EQUATIONS**

**Week Three & Four: GEOMETRY**

**Week Five: THREE DIMENSIONAL SHAPES**

**Week Six: ANGLES: IDENTIFICATION AND PROPERTIES OF ANGLES**

**Week Seven: ANGLES: THEOREMS**

**Week Eight: CONSTRUCTION- PARALLEL AND PERPENDICULAR LINES**

**Week Nine: STATISTICS (I) – DEFINITION**

**Week Ten: STATISTICS (CONTINUED) – GRAPHICAL PRESENTATION OF DATA**

**Week Eleven: STATISTICS (II) – AVERAGES**

**Mathematics for jss1 third term**

Below are the 2022 mathematics lesson notes for JSS 1 third term

# Mathematics Lesson Notes JSS1 Third Term

**Week One Topic: REVISION OF SECOND TERM’S WORK**

Summary of last terms work

**Week Two Topic: SIMPLE EQUATIONS**

1. Read the problem carefully and figure out what it is asking you to find.

Usually, but not always, you can find this information at the end of the problem.

2. Assign a variable to the quantity you are trying to find.

Most people choose to use **x** but feel free to use any variable you like. For example, if you are being asked to find a number, some students like to use the variable n. It is your choice.

3. Write down what the variable represents.

At the time you decide what the variable will represent, you may think there is no need to write that down in words. However, by the time you read the problem several more times and solve the equation, it is easy to forget where you started. To learn more: **Click here**

**Week Three & Four Topic: Geometry**

Plane Shapes

Plane shapes in mathematics are closed flat, 2-dimensional shapes. A closed, two-dimensional or flat figure is called a plane shape. Different plane shapes have different attributes, such as the number of sides or corners. A side is a straight line that makes part of the shape, and a corner is where two sides meet. Let’s take a look at some shapes:

As you can see, the plane shapes in the top row include a triangle, rectangle, diamond, and star. The plane shapes in the bottom row include a pentagon (or a 5-sided shape), circle, and square. Circle, Square, Rectangle and Triangle To learn more: **Click here**

**Week Five Topic: Three-dimensional shapes**

Nearly everything that we can see and touch takes up space. These things are either gases, liquids or solids. You will study some of the properties of liquids and gases in science.

Most solids, or three-dimensional shapes, such as stones and trees, have a rough and irregular shape. This usually occurs in nature. However, some three-dimensional shapes, such as tin, cans and houses, have regular shapes. These are usually made by people. We often call them geometrical solids. To learn more: **Click here**

# JSS1 Third Term Mathematics Lesson Note

**Week Six Topic: Angles as rotation **

We use the word angle for the amount of turns. For example, the figures below show the hands of a clock moving between 12 ‘clock to 12 ‘ clock.

Both hands turn. In one hour the amount that each hand turns is different

The minute hand makes one complete turn or one revolution

The angle turned = 1 revolution.

As we can measure length, we can measure angle To avoid fractions, one revolution is divided into 360 equal parts. Each part is called a degree. We use the symbol 0 for a degree.

1 revolution = 360 degrees or 3600

10 = 1/360 revolution

To learn more: **Click here**

**Week Seven Topic: Theorems**

Angles between two lines

Adjacent means “next to.” But we use this word in a very specific way when we refer to adjacent angles. Study these two figures. Only the pair on the right is considered to be adjacent, angles c and d. Adjacent angles must share a common side and a common vertex, and they must not overlap each other.

Vertical angles are pairs of angles formed by two intersecting lines. Vertical angles are not adjacent angles — they are opposite each other. In this diagram, angles a and c are vertical angles and angles b and d are vertical angles. Vertical angles are congruent. To learn more: Click here

# JSS1 Third Term Mathematics Lesson Note

**Week Eight Topic: CONSTRUCTION: PARALLEL AND PERPENDICULAR LINES**

In geometry, to construct a figure means to draw it accurately. Accurate construction depends on using measuring and drawing instruments properly.

There is a useful property to show that 2 given lines are parallel. This property states that if 2 given lines are both perpendicular to a third line, then the 2 lines are parallel. The figure below illustrates this property.

To learn more: **Click here**

**Week Nine Topic: STATISTICS 1 – DEFINITION**

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**PURPOSE AND DATA COLLECTION**

The need for statistics – statistical data

Suppose a stranger asks you for information about yourself. You could say a lot of things. For example your name, the town you live in; the school you go to; what you ate last night; the things you like; the things you don’t like; etc.

You might also use numbers, for example, I am 12 years old; I have 4 brothers and 2 sisters; I am 171 cm tall and my mass is 48kg; I wear size 6 shoes; my village is 15km from the school; etc.

We use the word data for basic information like this. When we use numbers, the information is called statistical data, or just statistics. The table is showing statistical data about two teams.

To learn more: **Click here**

**Week Ten Topic: STATISTICS (Continued) – GRAPHICAL PRESENTATION OF DATA**

Types of presentation

A good presentation can make statistical data easy to read, understand and interpret. Therefore it is important to present data clearly.

i. There are two main ways of presenting data: presentation of numbers or values in lists and tables;

ii. Presentation using graphs, i.e. pictures. We use the following examples to show the various kinds of presentations.

An English teacher gave an essay to 15 students.

She graded the essays from A (very good), through B, C.D, E to f (very poor). The grades of the students were: B, C, A, B, A, D, F, E, C, C, A, B, B, E, B

To learn more: **Click here**

**Week Eleven Topic: STATISTICS – AVERAGES**

Averages

The average of a set of numbers is a very important statistic. The average is typical of the set of numbers and gives information to them. For example:

a. If a football team’s average score is 5.2 goals, we know that the team is good at scoring goals.

b. If two classes have average ages of 8.7 years and 16.9 years, we expect that the first is a Primary School class and the second is a Secondary School class.

c. If the average life of a battery is 20 hours, we expect a new battery to last about 20 hours, which may be a little more or a little less.

There are many kinds of averages, here we will find out about three: the mean, the median, and the mode. To learn more: **Click here**