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Line 35: − Introducing formation of a shape with minimum number of lines and the space enclosed forms a geometric shape.The key geometric concepts that are associated with it and its properties are elaborated.+ − A plane figure formed by three intersecting lines.+ − Parameters that are associated and measured in a triangle.+ Line 69:
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→Additional Resources
* Web resources:
* Web resources:
** [https://en.wikipedia.org/wiki/Triangle Wikipedia, the free encyclopedia] : The website gives a comprehensive information on triangles from basics to in depth understanding of the topic.
** [https://en.wikipedia.org/wiki/Triangle Wikipedia, the free encyclopedia] : The website gives a comprehensive information on triangles from basics to in depth understanding of the topic.
** [https://jsuniltutorial.weebly.com/ix-triangles.html cbsemathstudy.blogspot.com] : The website gives worksheets for the chapters that can be downloaded. Worksheets for other chapters can also be searched for which are listed based on class.
** [https://jsuniltutorial.weebly.com/ix-triangles.html cbsemathstudy.blogspot.com] : The website contains worksheets that can be downloaded. Worksheets for other chapters can also be searched for which are listed based on class.
* Books and journals
* Books and journals
* Web resources:
* Web resources:
** [https://www.brighthubeducation.com/middle-school-math-lessons/39674-triangle-properties-and-angles/ Bright hub education] : The website describes a lesson plan for introducing triangles and lists classroom problems at the end of the lesson that can be solved for better understanding.
** [https://www.brighthubeducation.com/middle-school-math-lessons/39674-triangle-properties-and-angles/ Bright hub education] : The website describes a lesson plan for introducing triangles and lists classroom problems at the end of the lesson that can be solved for better understanding.
** [http://www.cpalms.org/Public/PreviewResourceLesson/Preview/40261 CPALMS] : The website gives lesson plan, activities and worksheets associated with triangles.
** [http://www.cpalms.org/Public/PreviewResourceLesson/Preview/40261 CPALMS] : The website contains lesson plan, activities and worksheets associated with triangles.
** [https://www.urbanpro.com/cbse-class-9-maths-construction UrbanPro] : This website gives downloaded worksheets for geometry construction.
** [https://www.urbanpro.com/cbse-class-9-maths-construction UrbanPro] : This website gives downloadable worksheets with problems on triangle construction.
** [https://schools.aglasem.com/59755 AglaSem Schools] : This website lists important questions for math constructions.
** [https://schools.aglasem.com/59755 AglaSem Schools] : This website lists important questions for math constructions.
===Learning Objectives===
===Learning Objectives===
* Identifying a triangle and understanding its formation
* Identifying a triangle and understanding its formation
* Recognizing all parameters related to triangles
* Recognizing parameters related to triangles
* Understanding formation of triangles based on sides and angles
* Understanding different formation of triangles based on sides and angles
* Establishing relationship between parameters associated with triangles
* Establishing relationship between parameters associated with triangles
==== Concept 1: Formation of a triangle, elements of a triangle and its measures ====
==== Concept 1: Formation of a triangle, elements of a triangle and its measures ====
The triangle is the basic geometrical figure that allows us to best study geometrical shapes. A quadrilateral can be partitioned into two triangles, a pentagon into three triangles, a hexagon into four triangles, and so on.These partitions allow us to study the characteristics of these figures. And so it is with Euclidean geometry—the triangle is one of the very basic parts on which most other figures depend. Here we will be investigating triangles and related its properties
===== Activities =====
===== Activities =====
====== [[Formation of a triangle]] ======
====== [[Formation of a triangle]] ======
Introducing formation of a shape with least number of lines and the space enclosed by these lines form a geometric shape.The key geometric concepts that are related with this are explained.
====== [[Measures in triangle|Elements and measures in triangle]] ======
====== [[Measures in triangle|Elements and measures in triangle]] ======
The components that make a triangle are investigated. Measuring these components gives a better understanding of properties of triangles. Relation between these components are conceptualized.
====== [[Interior and exterior angles in triangle]] ======
====== [[Interior and exterior angles in triangle]] ======
====== [[Relation between interior and exterior angles in triangle|Exterior angle theorem]] ======
====== [[Relation between interior and exterior angles in triangle|Exterior angle theorem]] ======
Relation between angles formed inside a triangles and angles outside a triangle
Relation between angles formed inside a triangles and angles outside a triangle. Exterior and interior angles and their dependencies
==== Concept 4: Construction of triangles ====
==== Concept 4: Construction of triangles ====