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# Unit 1: Lines

## About this unit

Learn what lines, line segments, and rays are and how to use them.

### Learn

### Practice

### Practice

### Learn

### Practice

### Practice

Test your understanding of

**Lines**with these NaN questions.If you're seeing this message, it means we're having trouble loading external resources on our website.

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Main content

Learn what lines, line segments, and rays are and how to use them.

Test your understanding of **Lines** with these NaN questions.