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1. Introduction : A triangle is a three sided closed polygon. According to the base of angles it is divided in to three. Right angled triangle is a triangle with one angle right.Area of atriangle is half the product of it's base and height. 2.Objective •differentiate right angled triangle from other triangles. •develops formula for area of triangle. •calculate the area of right angled triangle. 3.Subject mapping : Youtube link 4.Assignment : Questions 5.References • Victors class • Definition • Equation 6.Downloads • Formula • Work sheet