1(b) Angles on a straight line add up to...
For this activity, we will be dragging the pink points around to see what happens to the angles α, β and γ as well as what we can observe.
We will be moving the pink point to each of the crosses and note down any observations.
Questions
What do you notice about those two angles (α, β and γ) on a straight line? What do they add up to?
Is there a difference between the different coloured crosses?
What angle symbol do we find when the pink dot is on the green diamond shapes? What does this symbol represent?
Does the length of the line affect the angle?
*Quickfire Challenge!*
Let us hide one of the angles (α or β or γ) and see if you can work out the missing angle!