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# 1.The square READ with RE = 5.1 cm.

Construction:

Step 1: Draw RE = 5.1 cm.

Step 2: Draw an angle of $$90^{\circ}$$ at E and cut an arc EA = 5.1 cm.

Step 3: Draw two arcs from A and R with radius 5.1 cm to cut each other at D.

Step 4: Join RD and AD.

Hence we have, READ as the required square.