Find the length of the broken line if the length of the AB link is 40 mm, the BC link is 18cm, the CD link is 2dm 9 cm

Find the length of the broken line if the length of the AB link is 40 mm, the BC link is 18cm, the CD link is 2dm 9 cm. How to read the name of this broken line?

First, we will bring the data specified in this task to a single unit of measurement – centimeters, if we know, based on the current standards, that ten millimeters make up one centimeter, and ten centimeters make up one decimeter:

40: 10 = 4.

2 * 10 + 9 = 29.

Let’s calculate how many centimeters the value of the length of the broken line ABCD will correspond with the specified length of the links:

18 + 29 + 4 = 51.

Answer: With such links, the length of the broken line ABCD is 51 centimeters.