In broken ABCD, the length of the AB link is 12 dm, which is 2 times more than the BC link.

In broken ABCD, the length of the AB link is 12 dm, which is 2 times more than the BC link. The length of the CD link is 18dm. Find the length of the polyline ABCD.

Let us find the value of the length of the link BC, this will require the given value of the link length AB to be halved:

12: 2 = 6 dm – this is the value of the BC link length;

Let’s find the value of the length of the entire broken line ABCD, for this we need the value of the length of the link AB, add the value of the length of the link BC and add the value of the length of the link CD:

12 + 6 + 18 = 36 dm – this is the length of the broken line ABCD;

Answer: 36 dm – this is the value of the length of the broken line ABCD.