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You know that a closed figure formed by three intersecting lines is called a triangle (‘Tri’ means ‘three’) A triangle has three sides, three angles and three vertices For example, in triangle ABC, denoted as ∆ ABC (see Fig 7 1); AB, BC, CA are the three sides, ∠ A, ∠ B, ∠ C are the three angles and A, B, C are three vertices
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1 In the triangle ABC AB = 8 cm, AC Ð ABC Ð ACB - Maths
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Math Handbook of Formulas, Processes and Tricks
60 Perimeter and Area of a Triangle 61 More on the Area of a Triangle 62 Perimeter and Area of Quadrilaterals 63 Perimeter and Area of General Polygons 64 Circle Lengths and Areas 65 Area of Composite Figures Chapter 12: Surface Area and Volume 66 Polyhedra 67 A Hole in Euler’s Theorem 68 Platonic Solids 69 Prisms
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