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From Karnataka Open Educational Resources
Construction of a triangle with 3 sides (view source)
Revision as of 10:38, 26 April 2019
, 10:38, 26 April 2019no edit summary
Investigating formation of a unique triangle with the given parameters as the three sides. Constriction follows SSS congruence rule.
=== Objectives ===
=== Objectives ===
* To construct a triangle for given 3 sides
* To construct a triangle for given 3 sides
* Digital : Computer, geogebra application, projector.
* Digital : Computer, geogebra application, projector.
* Non digital : Worksheet and pencil
* Non digital : Worksheet and pencil
* Geogebra files : “[https://ggbm.at/bddzkw6y Triangle construction (3sides)]”
* Geogebra files : "[https://ggbm.at/dnpdzdq3 Triangle construction (3sides)]"
{{Geogebra|dnpdzdq3}}
===Process (How to do the activity)===
===Process (How to do the activity)===
* 1. Use the geogebra file to demonstrate how to construct a triangle given 3 sides.
* Use the geogebra file to demonstrate how to construct a triangle if three sides of a triangle are given
* 2. Students can be asked for a given any one side how many triangles are possible.
* Students can be asked for a given any one side how many triangles are possible.
* 3. How will you draw the second side? Where will you fix the position of the second side?
* How will you draw the second side? Where will you fix the position of the second side?
* 4. How will you draw the third side? How can you fix the position third side?
* How will you draw the third side? How can you fix the position third side?
* 5. For what measurement of sides the triangle is not possible.
* For what measurement of sides the triangle is not possible.
* 6. Vary the sliders to observe the changes reflected in the triangle.
* Vary the sliders to observe the changes reflected in the triangle.
* 7. Make different types of triangles with respect to sides by changing the sliders.
* Make different types of triangles with respect to sides by changing the sliders.
* 8. Challenge them to make
* Challenge them to make
** Isosceles right angled triangle,
** Isosceles right angled triangle,
** Equilateral triangle including right angle or obtuse angle
** Equilateral triangle including right angle or obtuse angle
* 9. Note the measure of sides in the worksheet
* Note the measure of sides in the worksheet
'''Work sheet'''
'''Work sheet'''
{| class="wikitable"
{| class="wikitable"
|}
|}
'''Evaluation at the end of the activity'''
'''Evaluation at the end of the activity'''
* Can you construct a triangle for any given sides?
* Can you construct a triangle for any given sides?
* For given 3 sides how many triangles are possible?
* 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)]
<nowiki>**</nowiki>[http://www.robocompass.com/share?id=1iexrtm431kxd Actual construction (using robocompass)]
[[Category:Triangles]]
[[Category:Class 8]]
[[Category:Classroom activities]]
