View source for Construction of a triangle with 3 sides

Investigating formation of a unique triangle with the given parameters as the three sides. Constriction follows SSS congruence rule.  

=== Objectives ===
* To construct a triangle for given 3 sides
* To show formation of different types of triangles when sides are varied
* To show changes in angles when sides are varied.
* To show possibility of  formation of a triangle 

===Estimated Time===
30 minutes

=== Prerequisites/Instructions, prior preparations, if any ===
Prior understanding of point, lines and angles, elements of triangle, properties of 	triangle

===Materials/ Resources needed===
* Digital : Computer, geogebra application, projector.
* Non digital : Worksheet and pencil
* Geogebra files :  "[https://ggbm.at/dnpdzdq3 Triangle construction (3sides)]"
{{Geogebra|dnpdzdq3}}

===Process (How to do the activity)===
* Use the geogebra file to demonstrate how to construct a triangle if three sides of a triangle are given
* Students can be asked for a given any one side how many triangles are possible.
* How will you  draw the second side? Where will you fix the position of the second side?
* How will you draw the third side? How can you fix the position third side?
* For what measurement of sides the triangle is not possible.
* Vary the sliders to observe the changes reflected in the triangle.
* Make different types of triangles with respect to  sides by changing the sliders.
* Challenge them to make
** Isosceles right angled triangle,
** Equilateral triangle including right angle or obtuse angle
* Note the measure of sides in the worksheet
'''Work sheet'''
{| class="wikitable"
|Side1
|Side2
|Side3 
|Side1+ Side2 > Side 3
|Side2 + Side 3 > Side 1
|Side1+ Side3 > Side 2
|YourObservations
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'''Evaluation	at the end of the activity'''
* Can you construct a triangle for any given sides?
* For given 3 sides how many triangles are possible?
* Will the triangle formed change if the order of sides taken for construction is changed?
<nowiki>**</nowiki>[http://www.robocompass.com/share?id=1iexrtm431kxd Actual construction (using robocompass)]

[[Category:Triangles]]
[[Category:Class 8]]
[[Category:Classroom activities]]