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EVALUATIONS
HELP EXIT VOCABULARY WEBSITE
LEARNING OUTCOMES
LESSONPLAN
INSTRUCTIONALDESIGNER
CONTENT
SUMMARY
POLYGONS
LEARNING OUTCOMES
At the end of the lesson students are able to :
Identify the concepts of polygons. Recognize and name polygons. Determine the number of sides, vertices and diagonals of given polygons. Identify the concepts of symmetry. Determine and draw the lines (s) of symmetry of shapes. Complete shapes given part of the shapes and the lines of symmetry.
LESSON PLANDay : ThursdayDate : 27/ 3 / 2008Time : 9.00-10.20 am Form : 1 MotivasiNumber of students : 35 Topic : 10 Learning Areas : Polygons Subtopic : 10.1 Recognizing Polygons.
: 10.2 Symmetry.Learning Outcomes : At the end of the lesson, students should be able to:
1) Recognise and naming the polygons. 2) Determine the number of sides, vertices
and diagonals of given polygon. 3) Determine and draw the lines
(s) of symmet of shapes. 4) Complete shapes given part
of the shades and the lines of symmetry.
Prior knowledge : Students knows the existence of certain object that’s have the shaped same as polygons in their surroundings.
Scientific attitude : Being cooperative, thinking rationally and being confident and independent.
Noble value : - Appreciating the all objects which we uses it everyday.
- Being responsible about this object and it must uses in the right way.
KBKK : Predicting, classifying, observing and using image and object to learn.
BBM : Courseware of the real world of Polygons Form 1
Phase ContentTeacher activities
Students activities
Sources
Induction set (2 min)
10.1 Introduction of polygons
Teacher shows a video the real world of polygons.
Students are watching the video that played by teacher.
Sources :The video of objects in polygon. KBKK/ Noble Values Observing, Appreciating the contribution of polygons.
Step 1(25 min)
10.2 Introduction of concept of polygons.
1) Teacher use the computer software to explain to students how to recognize and naming the polygons. 2) Teacher use the concrete materials such asprotractors, rulers, grid papers, geo-boards and computer software to explore the concept of polygons.. 3) Teacher shows a picture basic of polygons.
1) Students take note about developments of polygons. 2) Students are divided in group and ask to discuss and describe thethe relationshipbetween the sides, diagonals andvertices of polygons.
SourcesPPT: -Introduction to recognize polygons, naming and properties of polygons.-A diagram of polygons.
KBKK/ Noble Values : - Having critical and analytical thinking, thinking rationally. - Appreciating the contribution of science and technology.
Step 2( 20
min)
10.3 Introduction
of concept of symmetry.
1) Teacher teach students the introduction of concept of symmetry by using power point
presentation.2) Then, teacher shows
a picture of
symmetry.3) Teacher describes
the characteristics
symmetry of polygons by
using power point
presentations.
1) Students explore
the characteristics
symmetry by using mirrors, pattern
blocks, folding
papers or making
inkblot designs.2) Students
explore the importance of symmetry in
everyday situations
(e.g. pattern on buildings
and tiles).
Sources1) PPT:- Introduction of symmetry of
shapes.- The diagram shapes
of symmetry2) Worksheet
(activity 1)KBKK/ Noble
Values- Observing, having critical and
analytical thinking and being cooperative. Closing
( 30 min)
Tutorial Teacher gives a tutorial for students.
Students answer thequizzes.
Sources1) PPT- Tutorial
INSTRUCTIONAL DESIGNER
NOOR FARALIZA JAMAKD20051021690 NORHAZWANI SELAMAT
D20051021711
NOOR AIDA ABDULLAHD20051021691
NOR MAISARAH WAHABD20051021699
Recognising polygons
Do you know
which of them are polygons
?
Click the next button to view the
explanation
A polygon is a two dimensional shape that is enclosed by straight lines on all its sides.
Based on the above diagrams,
Is a three dimensional shape.
Is a two dimensional shape but enclosed by a
curve.
Is not enclosed by its sides
, and are two dimensional shapes that are enclosed by straight lines on all its sides.
Therefore, , , and are polygons.
Properties of Polygons
Vertex
Diagonal
A
B
C
D
Side
A polygon is a plane shape whose side are formed from three or more straight lines.
The table lists all the polygons having up to 8 sides.
Polygons
no. of
sides
no.of
angels
no.of
vertices
no. of diagonals
TRIANGLE 3 3 3 0
QUADRILATERAL 4 4 4 2
PENTAGON 5 5 5 5
HEXAGON 6 6 6 9
HEPTAGON 7 7 7 14
OCTAGON 8 8 8 20
Click the name of each polygon in the table to see a diagram.
Number of vertices = number of sides
What you can see about the number of vertices and the
number of sides?
An object is said to have line (s) of the symmetry if one side of it overlaps exactly with the other.
This can be done by folding the object along a specific line.
line of symmetry
Determining and drawing the line (s) of symmetry
How many line(s) of symmetry can you draw?
CLICK the figure below to view the line(s) of symmetry
Sumber : www.webweaver.nu
One line of symmetry
Sumber : www.tucoo.com
One line of symmetry
Four lines of symmetry
Three lines of symmetry
Six lines of symmetry
Five lines of symmetry
Completing a symmetrical figure
CLICK the figure below to view the symmetrical figure
Make sure all the parts match each
other
EVALUATIONS
QUESTION 1
QUESTION 2
QUESTION 3QUESTION 4
QUESTION 5
QUESTION 1
The figure below show a type of polygons.
The polygon is
pentagonheptagon
hexagon
trapezoid
Which of the following figures is a Which of the following figures is a polygon?polygon?
QUESTION QUESTION 22
Choose the correct statement :Choose the correct statement :
Triangle has three sides and vertices
true false
The number of vertices is equal to the number of sides
true false
QUESTION QUESTION 33
Which of the following has noWhich of the following has no
symmetrical axis?symmetrical axis?
QUESTION QUESTION 44
Determine the number of lines of Determine the number of lines of symmetry for the given shape.symmetry for the given shape.
2
5
4
3
QUESTION QUESTION 55
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SUMMARY
POLYGON
NAMING POLYGON RECOGNISE POLYGON
PROPERTIES OF POLYGON
According to number of side Example : triangle, quadrilateral, pentagon and etc.
Vertices – points where two side meet Diagonal – lines joining two non-adjacent vertices
The number of sides = the number of vertices
SYMMETRY
Determining and drawing the line of symmetry
Completing a symmetrical figure
Line of symmetry has parts the match each other perfectly.
To complete a shapes given part of shape and the line of symmetry.
Polygon- poligon
Side - sisi
Shape - bentuk
Hexagon – heksagon
Octagon – oktagon
Quadrilateral – sisi empat
Triangle – segi tiga
Diagonal – pepenjuru
Vertex – bucu
Fold – lipat
Mark – tanda
Line of symmetry – garis simetri
Symmetry - simetri
Visit the following websites to learn more about polygons:
http://www.mathleague.com/help/geometry/polygon.htm
www.math.com/school/subject3/lessons/S3U2L1GL.html www.mcwdn.org/Geometry/Polygons.html www.sparknotes.com/math/geometry1/polygons/section1.html
http://mathworld.wolfram.com/Polygon.html
http://standards.nctm.org/document/eexamples/chap4/4.2/part2.htm
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