A normal dimensional 2x2 is 1.5 inches by 1.5 inches.
no
Yes.
No. Matrix addition (or subtraction) is defined only for matrices of the same dimensions.
Just double one of the dimensions. 4 x 3 x 4 2 x 6 x 4 2 x 3 x 8
21 x 2 has greatest perimeter
If it's a cube, the dimensions are 2 x 2 x 2.
The dimensions of a one kilo gold rectangular bar are: 4 1/2' X 2" X 3/8" or 117mm X 53mm X 8.7mm
2" x 4"
4 x 4 1 x 16
18" X 24" X 2 - typically
2 cm x 2 cm x 2 cm
1 1/2" x 7 1/4"