Question

ABCD is a square is the measure of diagonal is equal to 52 units what is the length of a side

Answer 1

AC = diagonal =52units= d
AB= side=s

${d}^{2} = 2 \times {s}^{2} \\ d = 52 = s \sqrt{2} \\ s = 26 \sqrt{2} \: units$

Answer 2

please check the attachment