# for intersecting lines,vertically opposite angles are equal

We can see two lines AB and DC in black color. We can freely move these four points A, B, C and D. Angle AED(α) and angle BEC(β) are also written. Move the points A, B, C and D and observe how the angles get changed.

Questions to think about
1. Compare the values of α and β, what do we observe?
2. Is it possible to get α≠β?

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