Make a vertical line of any measurement on the horizontal line. Write down its length in cm and mm

ok. now what?

To make a vertical line of any measurement on a horizontal line, you will need a ruler or any other measuring tool. Here's how you can do it:

1. Take a ruler or any measuring tool that has both centimeters (cm) and millimeters (mm) markings.

2. Place the ruler horizontally on a flat surface, ensuring that the starting point of the ruler's measurement (usually "0" or "1") aligns with the left end of the horizontal line.

3. Find the desired length for your vertical line and locate the corresponding cm and mm markings on the ruler.

4. Position the ruler vertically along the horizontal line, aligning the "0" or starting point of the vertical line with the horizontal line.

5. Keeping the ruler steady, mark the desired length on the vertical line of the ruler using a pen or a pencil.

6. Remove the ruler, and you will have a vertical line with the desired measurement.

7. To write down the length of the line, simply note the measurement in centimeters and millimeters. For example, if the line is 5 centimeters and 7 millimeters long, you would write it as "5 cm 7 mm".