There are 10 millimeters to one centimeter therefore 35 millimeters would be 3.5 centimeters and 45 millimeters would be 4.5 centimeters. From here, you would multiply 3.5 by 4.5 and receive the answer 15.75. Meaning the answer to your question is 15.75 centimeters.

There are a number of ways that you can go about converting units of measurement. For example:

Most rulers and other items to aid measurement will have certain measurements printed onto them. For example, a lot of rulers will have centimeters printed down one side and millimeters printed down the other. From there, it would just be a case of counting along your ruler and finding where the two units meet.

Alternatively - you could use a number of units of measurement converters that are available online and on other devices such as cell phones. A quick Internet search will reveal an ample number of websites that will help you convert units of measurement.

As well as this, devices such as cell phones will either have converters available as standard or they will be available to download through their application store. That way you will have the ability to convert a number of measurements from wherever you are. Not only this, but a lot of converters also have the ability to convert currency and other things as well as units of measurement.

There are a number of ways that you can go about converting units of measurement. For example:

- Using measuring equipment
- Using online converters
- Doing the math for yourself

Most rulers and other items to aid measurement will have certain measurements printed onto them. For example, a lot of rulers will have centimeters printed down one side and millimeters printed down the other. From there, it would just be a case of counting along your ruler and finding where the two units meet.

Alternatively - you could use a number of units of measurement converters that are available online and on other devices such as cell phones. A quick Internet search will reveal an ample number of websites that will help you convert units of measurement.

As well as this, devices such as cell phones will either have converters available as standard or they will be available to download through their application store. That way you will have the ability to convert a number of measurements from wherever you are. Not only this, but a lot of converters also have the ability to convert currency and other things as well as units of measurement.