❖ In this lesson, we prove that the sum of the angles of a triangle is \(180^{\circ}\). Using clear explanations and simple geometry concepts, you’ll learn how this fundamental property is derived.

🎯 Concepts Covered in this lesson:

Use of a straight angle, which measures \(180^{\circ}\)

Use of alternate interior angles in the proof

🎯 We explore in this lesson:

The relationship between the interior angles of a triangle and a straight angle (\(180^{\circ}\))