883
edits
Changes
From Karnataka Open Educational Resources
no edit summary
# Digital : Computer, geogebra application, projector.
# Digital : Computer, geogebra application, projector.
# Non digital : Worksheet and pencil
# Non digital : Worksheet and pencil
# Geogebra files : “[https://www.geogebra.org/m/bwsvgqqg#material/z4h42k8z Introduction to a triangle.ggb]”
# Geogebra files : '''“[https://www.geogebra.org/m/bwsvgqqg#material/z4h42k8z Introduction to a triangle.ggb]”'''
* '''How to do'''
* '''How to do'''
# Use the geogebra file to illustrate.
# Use the geogebra file to illustrate.
# Digital : Computer, geogebra application, projector.
# Digital : Computer, geogebra application, projector.
# Non digital : Worksheet and pencil,6-8 strings (preferably in different colours)
# Non digital : Worksheet and pencil,6-8 strings (preferably in different colours)
# Geogebra files : “[https://www.geogebra.org/m/bwsvgqqg#material/hyecxd9u Elements of a triangle.ggb]”
# Geogebra files : '''“[https://www.geogebra.org/m/bwsvgqqg#material/hyecxd9u Elements of a triangle.ggb]”'''
* '''How to do'''
* '''How to do'''
# Students work individually but in their groups.
# Students work individually but in their groups.
# Digital : Computer, geogebra application, projector.
# Digital : Computer, geogebra application, projector.
# Non digital : Worksheet and pencil.
# Non digital : Worksheet and pencil.
# Geogebra files : “[https://www.geogebra.org/m/bwsvgqqg#material/jjmbu9ed Measures in a triangle.ggb]”
# Geogebra files : '''“[https://www.geogebra.org/m/bwsvgqqg#material/jjmbu9ed Measures in a triangle.ggb]”'''
* '''How to do'''
* '''How to do'''
# Show the Geogebra file and ask students to record the values of angles and sides that are seen and ask if there is any connection between the side and the angle
# Show the Geogebra file and ask students to record the values of angles and sides that are seen and ask if there is any connection between the side and the angle
# Digital : Computer, geogebra application, projector.
# Digital : Computer, geogebra application, projector.
# Non digital : Worksheet and pencil.
# Non digital : Worksheet and pencil.
# Geogebra files : “[https://www.geogebra.org/m/bwsvgqqg#material/q6fnttmn Angles of a triangle.ggb]”
# Geogebra files : '''“[https://www.geogebra.org/m/bwsvgqqg#material/q6fnttmn Angles of a triangle.ggb]”'''
* '''How to do'''
* '''How to do'''
# Ask students how many lines are there? They should be able to identify the points of intersection of the lines. How many points of intersection are formed?
# Ask students how many lines are there? They should be able to identify the points of intersection of the lines. How many points of intersection are formed?
# Are students able to recognize interior and exterior angles in a triangle
# Are students able to recognize interior and exterior angles in a triangle
# Have the students able to find a relation between the interior angle and exterior angle that are formed at each vertex?
# Have the students able to find a relation between the interior angle and exterior angle that are formed at each vertex?
== 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.
==== '''Activity No # 5 : Types of triangles based on sides''' ====
