There is no such thing as a milimeter. Millimetre, yes. Even millimeter (if you happen to be American).
Next, there are no units given for 9 x 12. It is, therefore, impossible to tell whether you mean 9 nanometres * 12 nanometres or 9 light years by 12 light years or something in between those - or possibly beyond.
Finally, a millimetre is a measure of distance in 1-dimensional space. 9 x 12 appears to be a measure in 2-dimensional space. A measure in 1-d cannot be converted to a 2-d measure.
I recommend that you reconsider your question and ask it, providing relevant units etc, and in a way that makes some sense.
No. 12 millimeters is greater than 9 millimeters just as 12 inches is greater than 9 inches.
111.6 A= 0.5 x 18.6 millimeters x 12.0 millimeters
x/9 = 12 Therefore, x = 9 x 12 x = 108
12 -9 + x = 3 -9 + x + 9 = 3 + 9 x = 3 + 9 x = 12
1,300 millimeters = 1.3 meters900 millimeters = 0.9 meter1.3 x .9 = 1.17 square meters
No. 12 millimeters is greater than 9 millimeters just as 12 inches is greater than 9 inches.
There are 10000 millimetres in one decametre. Therefore, 9 decametres is equal to 9 x 10000 = 90000 millimetres.
-12 = x+9 x+9 -9 = -12 -9 x = -21
111.6 A= 0.5 x 18.6 millimeters x 12.0 millimeters
There are 1.2 centimeters in 12 millimeters. 12 millimeters x 1 centimeter/10 millimeters = 1.2 centimeters 1 centimeter = 10 millimeters
x/9 = 12 Therefore, x = 9 x 12 x = 108
There are 10464.8 millimeters in 412 inches. 412 inches x 25.4 millimeters/1 inch = 10464.8 millimeters 1 inch = 25.4 millimeters
10 millimeters are in 9 centimeters
12 -9 + x = 3 -9 + x + 9 = 3 + 9 x = 3 + 9 x = 12
One metre is equal to 1000 millimetres. Therefore, 9 metres is equal to 9 x 1000 = 9000 millimetres.
1,300 millimeters = 1.3 meters900 millimeters = 0.9 meter1.3 x .9 = 1.17 square meters
9,18,27,36,45,54,63,72,81,90,99108