Mathematics
One side = 4.5 cm.
Rectilinear Figures
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Answer
Steps of construction :
Draw a line segment AB = 4.5 cm.
Draw AP ⊥ AB.
From AP cut off AD = 4.5 cm.
With B as a center and radius 4.5 cm draw an arc.
With D as center and radius 4.5 cm draw another arc cutting the former arc at C.
Join BC and CD.

Hence, ABCD is the required square.
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