Polygons

WELCOME TO THE REAL WORLD OF POLYGONS

EVALUATIONS HELP EXIT VOCABULARY WEBSITE LEARNING OUTCOMES LESSON PLAN INSTRUCTIONAL DESIGNER 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 PLAN Day : Thursday Date : 27/ 3 / 2008 Time : 9.00-10.20 am Form : 1 Motivasi Number 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

Sources PPT: 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. 1) Students take note about developments of polygons. 2) Students are divided in group and ask to discuss and describe the the relationship between the sides, diagonals and vertices of polygons. 1) Teacher use the computer software to explain to students how to recognize and naming the polygons . 2) Teacher u se the concrete materials such as protractors, rulers, grid papers, geo-boards and computer software to explore the concept of polygons . . 3) Teacher shows a picture basic of polygons. 1 0. 2 Introduction of concept of polygons. Step 1 (25 min) Sources : The video of objects in polygon. KBKK/ Noble Values Observing, Appreciating the contribution of polygons. Students are watching the video that played by teacher. Teacher shows a video the real world of polygons. 10 .1 Introduction of polygons Induction set (2 min) Sources Students activities Teacher activities Content Phase

Sources 1) PPT: - Introduction of symmetry of shapes. - The diagram shapes of symmetry 2) Worksheet (activity 1) KBKK/ Noble Values - Observing, having critical and analytical thinking and being cooperative. 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). 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. 10 .3 Introduction of concept of symmetry. Step 2 ( 20 min) Sources 1) PPT - Tutorial Students answer the quizzes. Teacher gives a tutorial for students. Tutorial Closing ( 30 min)

INSTRUCTIONAL DESIGNER NOOR FARALIZA JAMAK D20051021690 NORHAZWANI SELAMAT D20051021711 NOOR AIDA ABDULLAH D20051021691 NOR MAISARAH WAHAB D20051021699

Recognising polygons a b c d f e 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. f c e b d f d b a

Properties of Polygons Vertex Diagonal Side A polygon is a plane shape whose side are formed from three or more straight lines. A B C D

The table lists all the polygons having up to 8 sides. Click the name of each polygon in the table to see a diagram. 20 8 8 8 OCTAGON 14 7 7 7 HEPTAGON 9 6 6 6 HEXAGON 5 5 5 5 PENTAGON 2 4 4 4 QUADRILATERAL 0 3 3 3 TRIANGLE no. of diagonals no.of vertices no.of angels no. of sides Polygons

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

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 3 QUESTION 4 QUESTION 5

QUESTION 1 The figure below show a type of polygons. The polygon is pentagon heptagon hexagon trapezoid

Which of the following figures is a polygon? QUESTION 2

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 3

Which of the following has no symmetrical axis? QUESTION 4

Determine the number of lines of symmetry for the given shape. 2 5 4 3 QUESTION 5

WRONG ANSWER ! PLEASE TRY AGAIN!!!

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 VOCABULARY

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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Polygons

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Polygons