Consider a disk D of radius $1.$ We say a collection of shapes hides D if we can place the shapes

from that collection on top of the disk in such a way that each point of the disk is under some

part of at least one of the shapes. For example, D can be hidden by a single disk of radius

greater$-$than$-$or$-$equal$-$to $1.$ However, D cannot be hidden by a single disk of smaller radius

than $1.$ As another example, D can be hidden by $7$ disks of radius $3/4$ by placing one radius

$3/4$ disk at the center and the remaining radius $3/4$ disks around the edge of D as follows: