**Definitions:**

**Double Square Millimeter** (abbreviations: **mm4, or mm 4**): is the SI derived unit of area moment of inertia, a geometrical property of an area which reflects how its points are distributed with regard to an arbitrary axis.

**Double Square Centimeter** (abbreviations: **cm4, or cm 4**): is the SI derived unit of area moment of inertia, a geometrical property of an area which reflects how its points are distributed with regard to an arbitrary axis.

## How to Convert Double Square Millimeters to Double Square Centimeters

*Example: How many double square centimeters are equivalent to 72.1 double square millimeters?*

As;

1 double square millimeters = 0.0001 double square centimeters

72.1 double square millimeters = Y double square centimeters

Assuming Y is the answer, and by criss-cross principle;

Y equals 72.1 times 0.0001 over 1

(i.e.) Y = 72.1 * 0.0001 / 1 = 0.00721 double square centimeters

Answer is: 0.00721 double square centimeters are equivalent to 72.1 double square millimeters.

*Practice Question: Convert the following units into cm4:*

N.B.: After working out the answer to each of the next questions, click adjacent button to see the correct answer.

( i ) 7.44 mm4

( ii ) 37.51 mm4

( iii ) 39.25 mm4