1.

Find the side and perimeter of a square whose diagonal is 10 cm

Answer»

Diagonal is 10 cm

let SIDE of SQUARE be x
so by PYTHAGORAS theoram
2 {x}^{2}  =  {10}^{2}  \\  {x}^{2}  = 50 \\ x = 5 \sqrt{2}
now perimeter of square is

4×side

so perimeter=20√2



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