Construct a square, each of whose diagonals measures 5.8 cm.
Steps of Construction:
(i) Draw a line segment AC = 5.8 cm.
(ii) Draw its perpendicular bisector intersecting AC at O.
(iii) From O, cut off OD = OB = 2.9 cm
=(12BD).
(iv) Join AB, BC, CD and DA
ABCD is the required square.