For this activity, we will be dragging the pink points around to see what happens to the angles α, β, γ and δ as well as what we can observe.[br][br][u]Questions[/u][br][br]What do you notice about the sum of all four angles? [br]Does the length of the line matter? Why / why not?[br][br][u]*Quickfire Challenge!* [br][/u][br]Let us hide one of the angles and see if you can work out the missing angle!