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Line 1: − An exterior angle of the triangle is the angle between one side of a triangle and the extension of an adjacent side. Exterior angle of the triangle has a relation with interiors of the triangle.+ Line 14:
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Line 53: + + − − <nowiki>{| class="wikitable" !Triangle !Angle A !Angle B !Angle C !Exterior angle !Angle A + Angle B |- |Triangle1 | | | | | |- |Triangle2 | | | | | |- |Triangle3 | | | | | |}</nowiki> + + + +
Relation between interior and exterior angles in triangle (view source)
Revision as of 10:37, 26 April 2019
, 10:37, 26 April 2019no edit summary
Interior angle and the corresponding angle form a linear pair. This exterior angle in relation to the remote interior angles and their dependencies are deducted with the theorem.
=== Objectives ===
=== Objectives ===
*Non digital : Worksheet and pencil.
*Non digital : Worksheet and pencil.
*Geogebra files :
*Geogebra files :
*#'''“[https://ggbm.at/a33ygakp a. EA= Sum of opposite IAs in a triangle proof.ggb]” ,'''
*#'''“[https://ggbm.at/dqxt4jb3 a. EA= Sum of opposite IAs in a triangle proof.ggb]” ,'''
*#'''“[https://ggbm.at/rq7tx8kn b. EA= Sum of opposite IAs in a triangle.ggb]” ,'''
*#'''“[https://ggbm.at/ytruqndh b. EA= Sum of opposite IAs in a triangle.ggb]” ,'''
*#'''“[https://ggbm.at/gjwtzucu c. EA= Sum of opposite IAs in a triangle demo.ggb]”'''
*#'''“[https://ggbm.at/bt4qsh42 c. EA= Sum of opposite IAs in a triangle demo.ggb]”'''
{{Geogebra|yweqm6bj}}{{Geogebra|ytruqndh}}{{Geogebra|bt4qsh42}}
===Process (How to do the activity)===
===Process (How to do the activity)===
*In the triangle students should identify the angles of the triangle.
*In the triangle students should identify the angles of the triangle.
*Note the measure of angles
*Note the measure of angles
{| class="wikitable"
{| class="wikitable"
!
!Triangle
!
!Angle A
!
!Angle B
!
!Angle C
!Exterior angle
!Angle A + Angle B
|-
|-
|Triangle1
|Triangle1
|
|
|
|
|
|
|-
|-
|Triangle2
|Triangle2
|
|
|
|
|
|
|-
|-
|Triangle3
|Triangle3
|
|
|
|
|
|
|
|
|}
|}
'''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?
* Have the students able to identify the relation between exterior and interior opposite angles of a triangle?
[[Category:Triangles]]
[[Category:Class 8]]
[[Category:Classroom activities]]