### Home > CC2 > Chapter 1 > Lesson 1.1.1 > Problem 1-5

1-5.

According to the diagrams below, how long is each unknown piece?

How long is the entire length?

Which part ismm?

Try to answer the question with these things in mind.How long is the unknown length?

mm, because .

How long is the shorter unknown length?

The shorter length is

mm. Explain why on your paper. Now use the same method to find the entire length.