18
2
4 times the number of tiles in the length of the rectangle.
60
12
4, 8, or 12.
It depends on how many tiles long you wish to make your rectangle. Once that is determined, multiply your width by your length and you will have the amt of tiles needed. ie: 3 tiles wide and 4 tiles long= 12 tiles
5 x 8 = 40, so 40 tiles are in this rectangle.
Twelve.
3*5 = 15 tiles.
25
36
one tiles