Changes

# Interior and exterior angles in a triangle at a vertex, together form a linear pair.

# Interior and exterior angles in a triangle at a vertex, together form a linear pair.

=== Activity No # 1 : [http://karnatakaeducation.org.in/KOER/en/index.php/Formation_of_a_triangle Formation of a triangle] ===

=== Activity No # 1 : Click here [http://karnatakaeducation.org.in/KOER/en/index.php/Formation_of_a_triangle] ===

=== Activity No # 2 :  Elements of a triangle ===

=== Activity No # 2 :  Click here [http://karnatakaeducation.org.in/KOER/en/index.php/Elements_of_a_triangle] ===

[[Category:Triangles]]

[[Category:Triangles]]

[[Category:Class 9]]

[[Category:Class 9]]

=== Activity No # 3  : Measures in a triangle ===

=== Activity No # 3  : Click here [http://karnatakaeducation.org.in/KOER/en/index.php?title=Measures_in_triangle&oldid=30405&wteswitched=1] ===

=== Activity No # 4  : Interior and exterior angles in triangle ===

=== Activity No # 4  : Click here [http://karnatakaeducation.org.in/KOER/en/index.php/Interior_and_exterior_angles_in_triangle] ===

== Concept 2: Types of triangles based on sides and angles ==

== Concept 2: Types of triangles based on sides and angles ==

'''Types of triangles based on angles in the triangle'''  

'''Types of triangles based on angles in the triangle'''