Construction of a triangle with perimeter and base angles

Objectives
To construct a triangle with perimeter and base angles

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(Perimeter-base angles)”

Process (How to do the activity)
Evaluation at the end of the activity
 * Use the slider to construct the perimeter
 * How do you get the 3 points required for the triangle
 * Why is the half angle constructed at each points
 * Perpendicular bisectors for the two segment formed due to the intersection of the half angles are constructed
 * What do these bisectors mark on the perimeter line
 * How is the required triangle formed using this method
 * For what values of the angles the triangle is not formed.