Don’t understand this question your trying to ask
I'm assuming that you're talking about the dimensions of a rectangle. To find the area, you can multiply the length (2.25 meters) by the width (1.8 meters).
2.25*1.8=4.05
The area would be 4.05 sq. meters
One dozen is 12, so you’d set up the equation like this:
0.75(12) = 9
A dozen bars cost $9.
Supplementary means adds to 180
A+B=180
B=73
A+73=180
minus 73 both sides
A+73-73=180-73
A+0=107
A=107
A=107 degrees