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find the length of the diagonal of: (a) square in terms of its edge a; (b) a rectangle in terms of iys base b and its altitude h.

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Cheahjimmyviz
Diagonal of a square         D  =  a √2         where a = length of its side

Diagonal of a rectangle      D  = ( √ b² + h² )      where   b  =  base &     h = height