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From Karnataka Open Educational Resources
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# Introduce concepts of exterior angle.
# Introduce concepts of exterior angle.
* '''Pre-requisites'''
* '''Pre-requisites'''
Prior knowledge of point, lines, angles, parallel linesResources needed
# Prior knowledge of point, lines, angles, parallel linesResources needed
* '''Resources needed'''
* '''Resources needed'''
# Digital : Computer, geogebra application, projector.
# Digital : Computer, geogebra application, projector.
# To understand the elements of a triangle
# To understand the elements of a triangle
* '''Pre-requisites'''
* '''Pre-requisites'''
Prior knowledge of point, lines, angles, parallel lines
# Prior knowledge of point, lines, angles, parallel lines
* '''Resources needed'''
* '''Resources needed'''
# Digital : Computer, geogebra application, projector.
# Digital : Computer, geogebra application, projector.
|}
|}
* '''Evaluation at the end of the activity'''
* '''Evaluation at the end of the activity'''
# Have the students been able to identify the elements in a triangle?
# Have they been able to extrapolate any connection between the angle and side in a triangle?
[[Category:Triangles]]
[[Category:Triangles]]
[[Category:Class 9]]
[[Category:Class 9]]
# Understand the relation between various angles that are formed in a triangle.
# Understand the relation between various angles that are formed in a triangle.
* '''Pre-requisites'''
* '''Pre-requisites'''
Prior knowledge of point, lines, angles
# Prior knowledge of point, lines, angles
* '''Resources needed'''
* '''Resources needed'''
# Digital : Computer, geogebra application, projector.
# Digital : Computer, geogebra application, projector.
# Recognize the triangles based on the measures of the sides
# Recognize the triangles based on the measures of the sides
* '''Pre-requisites'''
* '''Pre-requisites'''
Prior knowledge of point, lines, angles, elements of triangle
# Prior knowledge of point, lines, angles, elements of triangle
* '''Resources needed'''
* '''Resources needed'''
# Digital : Computer, geogebra application, projector.
# Digital : Computer, geogebra application, projector.
# Recognize the triangles based on the measures of the sides
# Recognize the triangles based on the measures of the sides
* '''Pre-requisites'''
* '''Pre-requisites'''
Prior knowledge of point, lines, angles, elements of triangle
# Prior knowledge of point, lines, angles, elements of triangle
* '''Resources needed'''
* '''Resources needed'''
# Digital : Computer, geogebra application, projector.
# Digital : Computer, geogebra application, projector.
# To help visualization of the geometric proof
# To help visualization of the geometric proof
* '''Pre-requisites'''
* '''Pre-requisites'''
Prior understanding of point, lines and angles, adjacent angles, vertically opposite angles, linear pair, parallel lines, alternate angles, corresponding angles.
# Prior understanding of point, lines and angles, adjacent angles, vertically opposite angles, linear pair, parallel lines, alternate angles, corresponding angles.
* '''Resources needed'''
* '''Resources needed'''
# Digital : Computer, geogebra application, projector.
# Non digital : Worksheet and pencil.
# Geogebra files :
## '''“7a. Angles in a right triangle.ggb” ,'''
## '''“7b. Angle sum property proof.ggb” ,'''
## '''“7c. Angle sum property of a triangle.ggb”'''
'''“7b. Angle sum property proof.ggb” ,'''
'''“7c. Angle sum property of a triangle.ggb”'''
* '''How to do'''
* '''How to do'''
# Use the file - “7a. Angles in a right triangle.ggb”
# Use the file - “7a. Angles in a right triangle.ggb”
=== '''Activity No # 8 : Relation between interior and exterior angles in a triangle''' ===
=== '''Activity No # 8 : Relation between interior and exterior angles in a triangle''' ===
* '''Objectives'''
* '''Objectives'''
# To show interior angles of a triangle have a relation with its exterior angles.
* '''Pre-requisites'''
* '''Pre-requisites'''
Prior understanding of point, lines and angles, adjacent angles, vertically opposite angles, linear pair
# Prior understanding of point, lines and angles, adjacent angles, vertically opposite angles, linear pair
* '''Resources needed'''
* '''Resources needed'''
# Digital : Computer, geogebra application, projector.
# Non digital : Worksheet and pencil.
# Geogebra files :
## '''“8a. EA= Sum of opposite IAs in a triangle proof.ggb” ,'''
## '''“8b. EA= Sum of opposite IAs in a triangle.ggb” ,'''
## '''“8c. EA= Sum of opposite IAs in a triangle demo.ggb”'''
'''“8b. EA= Sum of opposite IAs in a triangle.ggb” ,'''
'''“8c. EA= Sum of opposite IAs in a triangle demo.ggb”'''
* '''How to do'''
* '''How to do'''
# In the triangle students should identify the angles of the triangle.
# In the triangle students should identify the angles of the triangle.
|}
|}
* Evaluation at the end of the activity
* Evaluation at the end of the activity
# Have the students able to identify the relation between exterior and interior opposite angles of a triangle?
