Quadrilaterals

Usage

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Concept Map
Flash

= Text Books =

Please refer the state govt. Text book of mathematics

=Additional Information=

Useful websites

 * Effective Introduction to Quadrilateral click here
 * Quadrilateral is also tetragon, quadrangle click here

Reference Books

 * Please download 9th standard mathematics textbook of Tamil Nadu state syllabus from the following link and refer the page 89 click here
 * Refer 9th standard mathematics ncert textbook from the following link click here

= Teaching Outlines =
 * Introduction to polygons
 * The meaning of quadrilateral
 * Identification of various types of quadrilaterals
 * Different properties of special quadrilaterals
 * Construction of quadrilaterals to given suitable data
 * Finding area of quadrilaterals
 * Introduction to cyclic quadrilaterals

Learning objectives

 * Students will be able to define quadrilaterals.
 * Students will be able to identify quadrilaterals.

Notes for teachers
This topic has its basics in polygons. Try to elicit live examples for quadrilaterals from within classroom, starting from the shape of a textbook. Show the vertices of a rectangular page. Mark three sets of four  points on the blackboard, one set being collinear and other non-collinear. Call students to join the points of each set of points. This activity will introduce them to the concept of quadrilateral.

Activity No #
Pattern blocks for per students, blank paper, colored pencils 10-15 minutes Student should be able to recognize polygons having different sides especialy four. Computer, projector Geogebra activities on Quadrilateral click here 1. Set the stage by playing a short game of “If you are…” with the students. When students    match what you are saying they stand up. When they sit back down, call out another “If you are _______ stand up now” statement. To end the game, tell the students to turn to a  neighbor and tell them all of the different names that applied to them. 2. Review the vocabulary words: sides and angles. 3. Tell students to take one of each of the type of pattern blocks out of the bag. 4. Ask students to sort their pattern blocks – do not tell them how to sort. 5. Go around and have each student tell you how they sorted. Write the different ways on the board. For duplicates, begin making tallies. 6. Refer to the list (some students should have mentioned that they sorted by the number of sides). Point out the number of sides/angles as the sorting rule. 7. Tell students that all of the blocks with four sides and four angles belong to the same family. That family is the “Quadrilateral” family. Explain that the blocks can have many names – just like you can be called many names. 8. Have the students to fold their paper in half and to draw a line down the middle of the paper. On one half of the paper, write the word “Quadrilaterals”. On the other half of the paper write the words “Not Quadrilaterals.” Prior to teaching create an example for students to go by. 9. Have students trace each different pattern block on the correct side of the paper. 10.When all of the students have traced the pattern blocks on their papers, have different students come up to overhead/document camera. The student should place a pattern block on the correct half of the paper so that students can all check their work. 1. What do all of your quadrilaterals have in common? 2. What is different about the quadrilaterals? 3. What did you put the hexagon on this half of the page?Please study the state govt. Text book of mathematics. 4. Can you combine your blocks to make different quadrilaterals? List out the quadrilaterals in this home.
 * Materials/ Resources needed
 * Estimated time
 * Prerequisites/Instructions, if any
 * Multimedia resources
 * Website interactives/ links/ / Geogebra Applets
 * Process/ Developmental Questions
 * Evaluation
 * Question Corner

= Fun Corner =
 * Math is fun []