Chapter: 7 TRIANGLES
A plane figure bounded by three lines in a plane is called a triangle. Every triangle have three sides and three angels. If ABC is any triangle then AB, BC & CA are three sides and ∠A, ∠B and ∠C are three angles.A plane figure bounded by three lines in a plane is called a triangle. Every triangle have three sides and three angels. If ABC is any triangle then AB, BC & CA are three sides and ∠A, ∠B and ∠C are three angles.