Angle sum Property of triangle activity was conducted in Class IV Cambridge International .Students were asked to cut out a triangle of any measurement and mark the three angles as 1, 2 and 3 .Then they were guided to cut the triangle into three pieces such that when they join all the three angles they lie on a line making an angle of 180 degrees. Students participated in the activity enthusiastically and concluded that the sum of all the three angles of any type of triangle is always 180 degrees.
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