Perimeter of Triangle

Transcript

Perimeter of triangleLet’s take a triangle ABC Perimeter of ∆ABC = Sum of all sides = AB + BC + AC What about specific triangles? Let’s do some examples Find perimeter of given triangle Perimeter of ∆ABC = Sum of all sides = 3 + 5 + 4 = 12 cm ∴ Required perimeter is 12 cm Find perimeter of Δ ABC Perimeter of ∆ABC = AB + BC + CA = 15 + 24 + 12 = 51 cm ∴ Required perimeter is 51 cm Find perimeter of Δ ABC Here, AB = AC = 8cm BC = 4 cm Perimeter of ∆ABC = Sum of all sides = AB + BC + AC = 8 + 4 + 8 = 20 cm ∴ Required perimeter is 20 cm Find perimeter of Δ ABC Since all sides are equal, it is an equilateral triangle Here, AB = BC = CA = a = 5cm Perimeter of equilateral ∆ABC = 3a = 3 (5) = 15 cm ∴ Required perimeter is 15 cm