These videos are perfect and will save me so much time. Thank you Mr Barrow!
@cormachiggins67974 жыл бұрын
Great vid
@prathamrahul49674 жыл бұрын
Prove it!
@rfbarrow4 жыл бұрын
It's actually quite easy to prove. Join each of the four vertices to the centre point to form four isosceles triangles. If you add up the opposite angles you'll see.