Polygons

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= Teaching Outlines =


 * 1) Introduction to  polygon
 * 2) Naming the polygons
 * 3) Characteristics of polygons.
 * 4) Types of polygons.

Activity No # 1. Which polygon am I ?

 * Estimated Time: 30 minutes.
 * Materials/ Resources needed: Laptop, geogebra file, projector and a pointer.
 * Prerequisites/Instructions, if any:
 * 1) The students should know that lines intersect to form figures.
 * 2) Plane closed figures with ≥ 3 sides are known as polygons.
 * 3) The intersecting points of two lines is known as a vertex and  the lines are the edges/sides.
 * 4) The student should know the meaning of greek numerals uni, bi, tri ....etc.
 * Multimedia resources: Laptop
 * Website interactives/ links/ / Geogebra Applets
 * Process:
 * 1) The teacher can tell the students that they are surrounded by many different kinds of shapes every day.
 * 2) Many of these shapes are two-dimensional plane figures.
 * 3) Plane figures are flat. They can be closed or not closed.
 * 4) Plane figures made up of three or more closed line segments are polygons.
 * 5) Each line segment of a polygon is a side. Polygons are classified and named based on the number of sides.
 * Developmental Questions:
 * 1) How many vertices, sides and angles does this figure have ? Name the figure.
 * 2) What is the point of intersection of two lines called ?
 * 3) What parameters do you identify in each figure ? (side, vertex, angle, plane surface and area )
 * 4) What can you say about the number of vertices and the number of sides in each figure ?
 * 5) Which figure would you think will be formed if the number of sides is increased indefinately.
 * Evaluation:
 * 1) What determines the side or edge of the figure ?
 * 2) Are the students able to corelate the names with the number of sides ?
 * 3) Are the students able to appreciate the nature of shapes formed with each increasing side?
 * 4) Students can discuss  angle sum property in each case by dividing the figure into triangles or quadrilaterals.
 * Question Corner:
 * 1) A hexagon is a polygon with _________ angles.
 * 2) Is circle a polygon ?
 * 3) What is a polygon with 12 sides called ?
 * 4) You have a collection of sides from triangles and decagons. The total number of sides is 100 and you have 4 decagons. How many triangles do you have ?

Activity No #

 * Estimated Time
 * Materials/ Resources needed
 * Prerequisites/Instructions, if any
 * Multimedia resources
 * Website interactives/ links/ / Geogebra Applets
 * Process/ Developmental Questions
 * Evaluation
 * Question Corner

Activity No #

 * Estimated Time:
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 * Website interactives/ links/ / Geogebra Applets:
 * Process/ Developmental Questions:
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 * Question Corner:

Activity No #

 * Estimated Time
 * Materials/ Resources needed
 * Prerequisites/Instructions, if any
 * Multimedia resources
 * Website interactives/ links/ / Geogebra Applets
 * Process/ Developmental Questions
 * Evaluation
 * Question Corner

Activity No # Tangram
This activity has been taken from the website :http://www.cimt.plymouth.ac.uk/projects/mepres/allgcse/bs7act1.pdf (a) a square from two triangles, and then change it to a parallelogram; (b) a rectangle using three pieces, and then change it into a parallelogram; (c) a trapezium with three pieces; (d) a parallelogram with four pieces; (e) a trapezium from the square, parallelogram and the two small triangles; (f) a triangle with three pieces; (g) a rectangle with all seven pieces.
 * Estimated Time : 40 minutes.
 * Materials/ Resources needed: Chart papers, scissors, pencil, scale.
 * Prerequisites/Instructions, if any
 * 1) The students should have understanding of basic shapes like square, rectangle, parallelogram, triangle and trapezium.
 * 2) They should be able to draw mentioned shapes accurately and cut exactly on boundaries.
 * Multimedia resources
 * Website interactives/ links/ / Geogebra Applets
 * Process:
 * 1) This is a very old Chinese puzzle known as a tangram.
 * 2) Cut out the square below into 7 shapes.
 * 3) Cut out the 7 shapes and rearrange them to form:
 * 1) Finally, put the pieces back together to form the original square.
 * Developmental Questions:
 * 1) Were you all able to read and follow the instructions.
 * 2) Name and point the different shapes in the figure.
 * 3) Name the dimensions of each shape.
 * Evaluation:
 * 1) Analyse how much space each shape is occupying.
 * 2) What can you refer to the space occupied by each shape.
 * Question Corner:
 * 1) What are the characteristic properties of each shape: square, rectangle, triangle, parallelogram and trapezium ?
 * 2) What type of two triangles would you need to form a square ?
 * 3) What did you learn from this activity ?

Activity No #

 * Estimated Time:
 * Materials/ Resources needed:
 * Prerequisites/Instructions, if any:
 * Multimedia resources:
 * Website interactives/ links/ / Geogebra Applets:
 * Process/ Developmental Questions:
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 * Question Corner:

Activity No #

 * Estimated Time
 * Materials/ Resources needed
 * Prerequisites/Instructions, if any
 * Multimedia resources
 * Website interactives/ links/ / Geogebra Applets
 * Process/ Developmental Questions
 * Evaluation
 * Question Corner

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