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Created page with "===Concept Map === File:5. Triangles.mm ===Additional Resources=== ====OER==== * Web resources: ** [https://en.wikipedia.org/wiki/Triangle Wikipedia, the free encyclopedi..."
===Concept Map ===
[[File:5. Triangles.mm]]
===Additional Resources===
====OER====
* Web resources:
** [https://en.wikipedia.org/wiki/Triangle Wikipedia, the free encyclopedia]
* Books and journals
* Textbooks
* NCERT Textbooks – Class 9
** Karnataka Govt Text book – Class 8
* Syllabus documents
====Non-OER====
* Web resources:
** [https://www.brighthubeducation.com/middle-school-math-lessons/39674-triangle-properties-and-angles/ Bright hub education] : blurb
*** [https://www.brighthubeducation.com/middle-school-math-lessons/39674-triangle-properties-and-angles/ Basic concepts of triangles,Types of triangles,Angle sum property,Exterior and interior angle relation]
*** [http://www.cpalms.org/Public/PreviewResourceLesson/Preview/40261 CPALMS -Introduction to triangles as a closed three sided figure,Inequalities in triangles]
*** [http://www.cpalms.org/Public/PreviewResourceLesson/Preview/40261 Inequalities in triangle, Investigate the relationship between the sides and angles in a triangle]
*** [https://jsuniltutorial.weebly.com/ix-triangles.html Test papers for triangles]
* Books and journals
* Textbooks
* Syllabus documents (CBSE, ICSE, IGCSE etc)
===Learning Objectives===
* Identify a triangle
* Recognize interior and exterior angles
* Classifying types of triangles
* Recognize the angle sum property
* Establish relation between interior and exterior angles
===Teaching Outlines===
==== Concept 1: Formation of a triangle, elements of a triangle and its measures ====
# A triangle is a three sided closed figure.
# It is one of the basic shapes in geometry.
# It triangle is a polygon with three edges and three vertices.
# There are three angles in a triangle formed at the three vertices of the triangle.
# Interior and exterior angles in a triangle at a vertex, together form a linear pair.
===== Activities =====
# [[Formation of a triangle]]: A plane figure formed by three intersecting lines.
# [[Elements of a triangle]]: Terms that are associated with triangle.
# [[Measures in triangle]]: Parameters that are measured in a triangle.
# [[Interior and exterior angles in triangle]]: Angles formed when a triangle is formed. [[Category:Triangles]]
[[Category:Class 8]]
== Concept 2: Types of triangles based on sides and angles ==
'''Types of triangles based on angles in the triangle'''
# Acute triangles are triangles in which the measures of all three angles are less than 90<sup>o</sup>.
# Obtuse triangles are triangles in which the measure of one angle is greater than 90<sup>o</sup>.
# Right triangles are triangles in which the measure of one angle equals 90 degrees.
'''Types of triangles based on sides in the triangle'''
# Equilateral triangles are triangles in which all three sides are the same length.
# Isosceles triangles are triangles in which two of the sides are the same length.
# Scalene triangles are triangles in which none of the sides are the same length.
=== Activities ===
# [[Types of triangles based on sides]]: Triangles formed are dependent on measures of sides.
# [[Types of triangles based on angles]]: Triangles formed are dependent on measures of angles.
== Concept 3: Angle sum property ==
=== Activities ===
# [[Angle sum property]]:
== Concept 4: Relation between interior and exterior angles in triangle ==
=== Activities ===
# [[Relation between interior and exterior angles in triangle]]
[[File:5. Triangles.mm]]
===Additional Resources===
====OER====
* Web resources:
** [https://en.wikipedia.org/wiki/Triangle Wikipedia, the free encyclopedia]
* Books and journals
* Textbooks
* NCERT Textbooks – Class 9
** Karnataka Govt Text book – Class 8
* Syllabus documents
====Non-OER====
* Web resources:
** [https://www.brighthubeducation.com/middle-school-math-lessons/39674-triangle-properties-and-angles/ Bright hub education] : blurb
*** [https://www.brighthubeducation.com/middle-school-math-lessons/39674-triangle-properties-and-angles/ Basic concepts of triangles,Types of triangles,Angle sum property,Exterior and interior angle relation]
*** [http://www.cpalms.org/Public/PreviewResourceLesson/Preview/40261 CPALMS -Introduction to triangles as a closed three sided figure,Inequalities in triangles]
*** [http://www.cpalms.org/Public/PreviewResourceLesson/Preview/40261 Inequalities in triangle, Investigate the relationship between the sides and angles in a triangle]
*** [https://jsuniltutorial.weebly.com/ix-triangles.html Test papers for triangles]
* Books and journals
* Textbooks
* Syllabus documents (CBSE, ICSE, IGCSE etc)
===Learning Objectives===
* Identify a triangle
* Recognize interior and exterior angles
* Classifying types of triangles
* Recognize the angle sum property
* Establish relation between interior and exterior angles
===Teaching Outlines===
==== Concept 1: Formation of a triangle, elements of a triangle and its measures ====
# A triangle is a three sided closed figure.
# It is one of the basic shapes in geometry.
# It triangle is a polygon with three edges and three vertices.
# There are three angles in a triangle formed at the three vertices of the triangle.
# Interior and exterior angles in a triangle at a vertex, together form a linear pair.
===== Activities =====
# [[Formation of a triangle]]: A plane figure formed by three intersecting lines.
# [[Elements of a triangle]]: Terms that are associated with triangle.
# [[Measures in triangle]]: Parameters that are measured in a triangle.
# [[Interior and exterior angles in triangle]]: Angles formed when a triangle is formed. [[Category:Triangles]]
[[Category:Class 8]]
== Concept 2: Types of triangles based on sides and angles ==
'''Types of triangles based on angles in the triangle'''
# Acute triangles are triangles in which the measures of all three angles are less than 90<sup>o</sup>.
# Obtuse triangles are triangles in which the measure of one angle is greater than 90<sup>o</sup>.
# Right triangles are triangles in which the measure of one angle equals 90 degrees.
'''Types of triangles based on sides in the triangle'''
# Equilateral triangles are triangles in which all three sides are the same length.
# Isosceles triangles are triangles in which two of the sides are the same length.
# Scalene triangles are triangles in which none of the sides are the same length.
=== Activities ===
# [[Types of triangles based on sides]]: Triangles formed are dependent on measures of sides.
# [[Types of triangles based on angles]]: Triangles formed are dependent on measures of angles.
== Concept 3: Angle sum property ==
=== Activities ===
# [[Angle sum property]]:
== Concept 4: Relation between interior and exterior angles in triangle ==
=== Activities ===
# [[Relation between interior and exterior angles in triangle]]