Topicmc96b1938c180691b_1528449000663_0Topic

Coordinate system

Levelmc96b1938c180691b_1528449084556_0Level

Second

Core curriculummc96b1938c180691b_1528449076687_0Core curriculum

X. The number linenumber linenumber line. The coordinate systemcoordinate systemcoordinate system in the planeplaneplane. The student:

2) finds the coordinates of the given (in the drawing) grid in the coordinate system in the plane;

3) draws the grids with the given integer coordinates (of any sign) in the coordinate system in the plane.

Timingmc96b1938c180691b_1528449068082_0Timing

45 minutes

General objectivemc96b1938c180691b_1528449523725_0General objective

Interpreting and creating mathematical texts and presenting data graphically.

Specific objectivesmc96b1938c180691b_1528449552113_0Specific objectives

1. Specifying the positionpositionposition of the coordinates in the planeplaneplane.

2. Determining the points in the coordinate system in a plane.

3. Communicating in English; developing mathematical and basic scientific, technical and digital competences; developing learning skills.

Learning outcomesmc96b1938c180691b_1528450430307_0Learning outcomes

The student:

- specifies the position of the coordinates in the plane,

- determines the points in the coordinate systemcoordinate systemcoordinate system.

Methodsmc96b1938c180691b_1528449534267_0Methods

1. Brainstorming.

2. Situational analysis.

Forms of workmc96b1938c180691b_1528449514617_0Forms of work

1. Individual work.

2. Class work.

Lesson stages

Introductionmc96b1938c180691b_1528450127855_0Introduction

The teacher revises the classes in which the students became familiar with the number linenumber linenumber line and they were indicating the positions of the pieces on the chessboard and the Battleship board.

The students answer the following questions:

How is the number line called?

What does the orientation of the axis tell us about?

How is the unit segment called?

How can we describe the positionpositionposition of the pointpointpoint on the number line?

How can we describe the position of the piece on the chessboard?

How can we describe the coordinates of the point on the Battleship board?

Proceduremc96b1938c180691b_1528446435040_0Procedure

The teacher informs the students they are going to become familiar with the notion of the coordinate systemcoordinate systemcoordinate system. They are also going to specify the position of the points on the number linenumber linenumber line and indicate the points in the coordinate system.

The teacher shows the drawing presenting the coordinate system.

[Illustration 1]

The students work using the brainstorming method. They answer the following questions:

What elements does the coordinate system consist of?

What points do the axes of the coordinate system intersect at?

How are the axes of the coordinate system described?

The students together come up with the following conclusions:

- The coordinate systemcoordinate systemcoordinate system is made of two perpendicular number lines.
- The pointpointpoint of the intersection of the two axes is called the originoriginorigin.
- The horizontal axis (abscissaeabscissaeabscissae) is marked with x.  
- The vertical axis (ordinatesordinatesordinates) is marked with y.

The teacher shows the drawing presenting the coordinate system with the marked points A, B, C and D.

[Illustration 2]

The students look at the drawing and answer the following questions:

How can we describe the positionpositionposition of the points in the coordinate system?

What axis describes the first number of the ordered pair of numbers?

What axis describes the second number of the ordered pair of numbers?

What is the pair of numbers describing the originoriginorigin of the coordinate system?

The students together draw the following conclusions:

- The position of the point in the coordinate system is described by the ordered pair of the numbers called the coordinates.
- The first coordinate is read on the x axis and it is called the abscissae.
- The second coordinate is read on the y axis and it is called the ordinate.
- The origin of the coordinate system is marked with the letter O with the coordinates of (0,0).
mc96b1938c180691b_1535789929957_0- The position of the point in the coordinate system is described by the ordered pair of the numbers called the coordinates.
- The first coordinate is read on the x axis and it is called the abscissae.
- The second coordinate is read on the y axis and it is called the ordinate.
- The origin of the coordinate system is marked with the letter O with the coordinates of (0,0).

The students answer the following questions:

How much is the abscissaeabscissaeabscissae (the first coordinate) of the points lying on the y‑axis?

How much is the ordinate (the second coordinate) of the points lying on the x‑axis ?

The students should can come up with the following conclusions:

- The abscissaeabscissaeabscissae (first coordinate) of the points lying on the y axis equals 0.
- The ordinate (the second coordinate) of the points lying on the x axis equals 0.

On the basis of the information the students have learned they read the coordinates of the points in the coordinate system.

Task 1

Look at the drawing below and read the coordinates of the points  A, B, C, D, E, F.

[Illustration 3]

Task 2

Draw the coordinate systemcoordinate systemcoordinate system and indicate the following points :

P= (-6, -2), R = (-3, 1), S = (0, 3), T = (4, 0), U = (5, 2), W = (7, -5).

The students become familiar with the notion of the quadrantquadrantquadrant of the coordinate system.

The axes of the coordinates divide the planeplaneplane into four parts, each of them is called the quadrant of the coordinate system. They are given numbers from I to IV counter clockwise direction, starting in the quadrant which has two positive coordinates.

[Illustration 4]

The students answer  the following questions:

What are the signs of the coordinates lying in the first quadrantquadrantquadrant?

What are the signs of the coordinates lying in the second quadrant?

What are the signs of the coordinates lying in the third quadrant?

What are the signs of the coordinates lying in the fourth quadrant?

The students should come up with the following conclusion:

- If the point is situated in the 1Indeks górny st quadrant of the cooperate system both of the cooperates are the positive numbers.
- If the point is situated in the 2Indeks górny nd quadrant of the cooperate system the first cooperate is negative number the second one is positive.
- If the point is situated in the 3Indeks górny rd quadrant of the cooperate system both of the cooperates are the negative numbers.
- If the point is situated in the 4Indeks górny th quadrant of the cooperate system the first cooperate is positive number, the second one is negative.
mc96b1938c180691b_1527752256679_0- If the point is situated in the 1Indeks górny st quadrant of the cooperate system both of the cooperates are the positive numbers.
- If the point is situated in the 2Indeks górny nd quadrant of the cooperate system the first cooperate is negative number the second one is positive.
- If the point is situated in the 3Indeks górny rd quadrant of the cooperate system both of the cooperates are the negative numbers.
- If the point is situated in the 4Indeks górny th quadrant of the cooperate system the first cooperate is positive number, the second one is negative.

It is illustrated in the drawing below.

[Illustration 5]

Task 3

Open the applet and change the positionpositionposition of pointpointpoint D to get the following cooperates.

[Geogebra applet]

Task 4

Draw the following table.

[Table 1]

Specify in which of the quadrants the given point is situated and put it into the right field of the table.

(-3, 2), (34, -2), (0, 4), (23, 2.4), (-3, -8), (0, 27), (-15, 0), (3.4, -8), (-4, 213), (0, 2.6), (25, 0), (37, 200), (-70, -91), (-1, 0), (-3, 6), (12, -9).

An extra task:

Draw the cooperate system and indicate the following:

a) With green all the points having the integers as the coordinates, whose abscissaeabscissaeabscissae equals 2 and the ordinate is larger than -4 and smaller than 3,

b) With red all the points having the integers as the coordinates, whose ordinate equals 5 and abscissae is larger than -6 and smaller than 5.

Lesson summarymc96b1938c180691b_1528450119332_0Lesson summary

The students do the summarising tasks.

Then together they sum up the classes drawing the conclusions to memorise:

- The coordinate system is made of two perpendicular number lines.
- The point of the intersection of the two axes is called the origin.
- The horizontal axis (abscissae) is marked with x.
- The vertical axis (ordinates) is marked with y.
- The position of the point in the coordinate system is described by the ordered pair of the numbers called the coordinates.
- The first coordinate is read on the x axis and it is called the abscissae.
- The second coordinate is read on the y axis and it is called the ordinate.
- The origin of the coordinate system is marked with the letter O with the coordinates of (0,0).
- The axes of the coordinates divide the plane into four parts, each of them is called the quadrant of the coordinate system.
mc96b1938c180691b_1527752263647_0- The coordinate system is made of two perpendicular number lines.
- The point of the intersection of the two axes is called the origin.
- The horizontal axis (abscissae) is marked with x.
- The vertical axis (ordinates) is marked with y.
- The position of the point in the coordinate system is described by the ordered pair of the numbers called the coordinates.
- The first coordinate is read on the x axis and it is called the abscissae.
- The second coordinate is read on the y axis and it is called the ordinate.
- The origin of the coordinate system is marked with the letter O with the coordinates of (0,0).
- The axes of the coordinates divide the plane into four parts, each of them is called the quadrant of the coordinate system.

Selected words and expressions used in the lesson plan

abscissaeabscissaeabscissae

coordinate systemcoordinate systemcoordinate system

number linenumber linenumber line

ordinatesordinatesordinates

originoriginorigin

perpendicularityperpendicularityperpendicularity

planeplaneplane

pointpointpoint

positionpositionposition

quadrantquadrantquadrant

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number line1
number line

oś liczbowa

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układ współrzędnych

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plane1
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płaszczyzna

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punkt

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oś odciętych

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oś rzędnych

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