Difference between revisions of "Construction of a triangle with side, angle and sum of other two sides"
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+ | The triangle inequality states that the sum of the lengths of any two sides of a triangle must be greater than or equal to the length of the third side. Construction of a triangle with given parameters sum of two sides and an angle follows SAS congruence rule. | ||
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=== Objectives === | === Objectives === | ||
To construct a triangle with side, angle and sum of other two sides | To construct a triangle with side, angle and sum of other two sides | ||
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* 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/ | + | * Geogebra files : “[https://ggbm.at/yysjtkj4 Triangle Construction(1side-1angle-sum of other 2 sides)]” |
+ | {{Geogebra|yysjtkj4}} | ||
===Process (How to do the activity)=== | ===Process (How to do the activity)=== | ||
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[[Category:Triangles]] | [[Category:Triangles]] | ||
[[Category:Class 8]] | [[Category:Class 8]] | ||
+ | [[Category:Classroom activities]] |
Latest revision as of 10:40, 26 April 2019
The triangle inequality states that the sum of the lengths of any two sides of a triangle must be greater than or equal to the length of the third side. Construction of a triangle with given parameters sum of two sides and an angle follows SAS congruence rule.
Objectives
To construct a triangle with side, angle and sum of other two sides
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 : “Triangle Construction(1side-1angle-sum of other 2 sides)”
Download this geogebra file from this link.
Process (How to do the activity)
- Use the slider to set the base and the given angle
- The difference of the other two sides is marked using the slider
- Follow the steps for construction – step1, step2
- Students can vary the sliders to observe the changes reflected in the triangle.
Evaluation at the end of the activity
- When does the triangle not form?