Current location - Plastic Surgery and Aesthetics Network - Wedding supplies - (20 13? As shown in the figure, it is known that the diagonal length of the square ABCD is 22, and the point O is the symmetrical center of the square.
(20 13? As shown in the figure, it is known that the diagonal length of the square ABCD is 22, and the point O is the symmetrical center of the square.
Solution: Let the side length of a square be a, then 2a2=(22)2,
Solution: a=2,
The properties of folding transformation show that ad = a ′ b ′, a ′ h = ah, b ′ g = DG,
Circumference of shadow = a' b'+(a' h+BH)+BC+(CG+b' g) = AD+AB+BC+CD = 2× 4 = 8.