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Polygons Standards: 3.1 Use properties and characteristics of two-and three- dimensional shapes and geometric CSDE theorems to describe relationships, communicate ideas and solve problems GLE 6th Gr. Classify sets and subsets of polygons using the relationship of the sides (length, parallel and perpendicular) and angles (types and measure). CMT 17A: Identify and classify two- and three- dimensional geometric shapes and figures 17B: Draw, describe and classify two-and three- dimensional geometric shapes and figures CT ELL 2.2 Use English to read and write in the academic setting Beginner: Classify objects according to number, shape, color, size , function and physical characteristic Intermediate: Classify data and information Advanced: Develop a critical stance Theme: Geometric figures Lesson Topic: Polygons Content Objective: TLW work collaboratively in groups to sort, classify, describe, and compare polygons Language Objective: TLW use prefixes, key words (refer to PowerPoint) To identify, compare, classify, and justify decisions orally and in writing Cultural Objective: TLW identify polygons in various country flags Motivation: Identify polygons in various flags from students’ cultural backgrounds, review previous concepts: angles, line segments, congruency Key Vocabulary: Polygon, congruent, angles, sides, lines, simple, regular Content Concepts: A polygon is a closed figure formed by three or more sides Simple: line segments don’t cross each other Regular Polygons have sides and angles that are congruent The number of sides determines the name of the polygon 3. Triangle 4. Quadrilateral 5. Pentagon 6. Hexagon 7. Heptagon 8. Octagon 9. Nonagon 10. Decagon Materials: Word Splash template, illustrated word wall, word sort cards, frames, vocabulary logs, markers/crayons, comparison organizers Supplementary Materials: Technology: PowerPoint: Prefixes and Polygons PowerPoint: Word Sort Cards www.Math.com http://www.mathleague.com/help/geometry/polygons.htm http://standards.nctm.org/document/eexamples/chap4/4.2/part2.htm http://www.aaamath.com/geo318-polygons-numbers.html#section2 Practice/Application: Word Splash Complete individually, discuss in pairs (Think-PairShare) Shape Sort: Is it a Polygon? Groups of two or three students Shape Sort: Is it a Regular or Irregular Polygon? Groups of two or three students Web games Individual or in pairs Review/Assessment: Thumbs up/thumbs down: Is it a Polygon? Is it a regular polygon? Number 1 to 3 Self Assessment: At the end of the lesson Sentence frames (3) differentiated by students’ level of proficiency Completion of group project WORD SPLASH (Illustrated Word Wall) Name: _________________ Vocabulary Word Date: ____________________ Something that reminds me of it. Other words I think of: __________ ____________________________ What I think it means: ______________________________ ______________________________ ______________________________ ______________________________ One good sentence (from the book): _______________________________ _______________________________ _______________________________ _______________________________ Dictionary Definition: ______________________________ ______________________________ ______________________________ ______________________________ Another good sentence (from my head): _______________________________ _______________________________ _______________________________ _______________________________ Created by Jackie Matos Shape Sort: Is it a polygon? Print slides (six slides per page) from the Polygon Sort PowerPoint and cut to use as flash card for sorting In pairs, students will then place each card on the appropriate box and explain how each was categorized Date: ___________________________________ Class: ________________________ Names: __________________________________________________________________________________________ Polygon NOT a Polygon Why? On the SMART Board: Review Polygon Prefixes PowerPoint Display the three polygons below In groups, have students discuss the polygons Select three groups to present their conclusions to the class Name each polygon. Then tell if the polygon is a regular polygon. ______________________ __________________________ ______________________ Polygons: Regular or Irregular? Print slides (six slides per page) from the Polygon Sort PowerPoint and cut to use as flash card for sorting In pairs, students will then place each card on the appropriate box and explain how each was categorized Date: ___________________________________ Class: ________________________ Names: _________________________ _________________________ _______________________ Polygons Regular Polygons Irregular Polygons NOT Polygons Practice/Application Web Games!!! http://www.math.com/school/subject3/lessons/S3U2L2GL.html Click on Step 1: Basic Polygons tutorial: Provides an interactive table where students click on the polygon’s name and an illustration of the polygon appears. Also has key word highlighted and hyperlinked to simpler definitions Click on Step 2: In Depth tutorial: Provides an extension of the lesson for advanced students which includes formulas for finding the sum of the interior angles Click on Step 3: Examples: Provides brief explanation and illustration of how to find the sum of the angles Click on Step 4: Workout: An online quiz that provided immediate feedback (right/wrong) and redirects students to specific tutorials based on specific need as measured by the responses on the quiz http://www.mathleague.com/help/geometry/polygons.htm Reinforces lesson vocabulary though illustrations; can be used as an extension activity for mathematically advanced students because it includes additional concepts beyond those addresses in this lesson http://standards.nctm.org/document/eexamples/chap4/4.2/part2.htm This site provides interactive computer geoboards where students can make as many polygons as they desire on one geoboard using virtual rubber bands. Students are to work in pairs and discuss their creations. http://www.aaamath.com/geo318-polygons-numbers.html#section2 This site can be used as a fun way to reinforce lesson concepts. Click on Practice: This site requires students to “Name the Type of Polygon!” Students are provided with attributes of a polygon and they have to select the correct type of polygon. It provides immediate feedback as well as percent correct. Click on Play: Students can choose from three different games: Count Down, Give me Time, 20 Questions COMPARISON MATRIX (Guided Practice) Figure Conclusion/Observations: Polygon Not a Polygon Number of Sides Polygon Name Regular Polygon Irregular Polygon INDEPENDENT PRACTICE: Beginners Figure Polygon Not a Polygon Number of Sides Polygon Name Regular Polygon Irregular Polygon INDEPENDENT PRACTICE: Intermediate lines polygons three polygon intersect measurement regular angles A ______________is a figure with at least ________ sides_______________. Polygons can be ____________ or irregular. Regular ___________ have __________and _________ that are _____________. This means that the angles and sides have the same _______________. Examples of regular polygons are__________________, _______________, ______________and _______________. Examples of irregular polygons are: _______________, ,__________________, and __________________. INDEPENDENT PRACTICE: Beginners/intermediate three same figure polygons A polygon is a ___________ with at least ________ line segments that do not cross or intersect. Polygons can be regular or irregular. Regular ______________ have congruent angles and lines. This means that the angles and lines have the _________ measurement. Application: United States a. How many polygons can you identify in the flag of the United States? __________________________________________________________ b. How many are regular polygons? Why? Name them. __________________________________________________________ c. How many are irregular? Why? Name them __________________________________________________________ Flags How many polygons can you identify? Name them. ALBANIA EGYPT INDIA HAITI CHINA
