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From Karnataka Open Educational Resources
→Activity No #
First teacher can talk about or try to elicit basic points of geometry like lines, collinear and non collinear point, vertices,sides ect. this leads to the triangle definition.Then by using activity try to classify triangle based on side and angles and name them. teacher can also try to elicit live examples for triangle which are seen in daily life. Teacher can use the inducto deductive or CAM method.
First teacher can talk about or try to elicit basic points of geometry like lines, collinear and non collinear point, vertices,sides ect. this leads to the triangle definition.Then by using activity try to classify triangle based on side and angles and name them. teacher can also try to elicit live examples for triangle which are seen in daily life. Teacher can use the inducto deductive or CAM method.
===Activity No # classification of triangle based on sides ===
===Activity No 1 # classification of triangle based on sides ===
{| style="height:10px; float:right; align:center;"
{| style="height:10px; float:right; align:center;"
|<div style="width:150px;border:none; border-radius:10px;box-shadow: 5px 5px 5px #888888; background:#f5f5f5; vertical-align:top; text-align:center; padding:5px;">
|<div style="width:150px;border:none; border-radius:10px;box-shadow: 5px 5px 5px #888888; background:#f5f5f5; vertical-align:top; text-align:center; padding:5px;">
* '''Question Corner'''
* '''Question Corner'''
===Activity No # ===
===Activity No 2 # Interior Angle Sum Property of a triangle ===
{| style="height:10px; float:right; align:center;"
{| style="height:10px; float:right; align:center;"
|<div style="width:150px;border:none; border-radius:10px;box-shadow: 5px 5px 5px #888888; background:#f5f5f5; vertical-align:top; text-align:center; padding:5px;">
|<div style="width:150px;border:none; border-radius:10px;box-shadow: 5px 5px 5px #888888; background:#f5f5f5; vertical-align:top; text-align:center; padding:5px;">
''[http://www.karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div>
''[http://www.karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div>
|}
|}
* '''Estimated Time'''
* '''Estimated Time-'''45 minutes
* '''Materials/ Resources needed'''
* '''Materials/ Resources needed'''
* '''Prerequisites/Instructions, if any'''
* chart paper, pencil, scale, protractor
* '''Prerequisites/Instructions, if any''' ''Students need to know:''
** a triangle is a three sided polygon.
** types of triangles by sides and angles.
** the characteristics of triangles by sides and angles.
** facts of supplementary, adjacent and vertical angles.
** write and solve simple linear equations.
* '''Multimedia resources'''
* '''Multimedia resources'''
* Laptop
* '''Website interactives/ links/ Geogebra Applets'''
* '''Website interactives/ links/ Geogebra Applets'''
* Geogebra file on interior angle sum of a triangle, [https://www.ck12.org/assessment/tools/geometry-tool/plix.html?eId=MAT.GEO.407.01&questionId=546667e25aa4130310c1bed3&artifactID=1884324&backUrl=https%3A//www.ck12.org/geometry/triangle-angle-sum-theorem/%23interactive&plix_redirect=1 Lighthouse (ck-12 series)]
* '''Process (How to do the activity)'''
* '''Process (How to do the activity)'''
* <u>Step 1-</u> 1. On the piece of paper, use your pencil and ruler to draw a triangle. 2. Draw different types of triangles: Acute, Obtuse, or Right angled triangle. 3. Use a protractor to measure each angle of the triangle. 4. Label the interior of each angle. 5. Add all the angle measures together. What is the sum? 6. Cut out three angles from given triangles and rearrange the 3 “angles” so that their vertices meet at one point with no overlap. 7. Rearrange them to constitute one angle. What does this tell you about sum of the angles in the triangle?
* '''Developmental Questions (What discussion questions)'''
* '''Developmental Questions (What discussion questions)'''
* '''Evaluation (Questions for assessment of the child)'''
* '''Evaluation (Questions for assessment of the child)'''
