English: To the extent that this is a square this is going to be 90º and if that is 90º and this whole diagonal is the diagonal is dimension is d. So, then, therefore, this half the diagonal is d/2, half the diagonal here is also d/2.
Telugu: కాబట్టి, ఈ సగం వికర్ణం d/2, ఇంకా ఇక్కడ సగం వికర్ణం కూడా d/2 అవుతుంది.