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### Objective

Students will explore the distance formula and its application to the radius of circles.

### Example Questions

1) What is the distance between points c(-2,3) and D(0,5)?

2) The point ( -2,-1 ) lies on a circle. What is the length of the radius of this circle if the center is located at ( 0, 4 )?

### Other Details

This is a 4 part worksheet:

**Part I**Model Problems.**Part II**Practice Problems**Part III**Practice Problems with Circles**Part IV**Mixed Problems

### Resources

- Video Tutorial (You Tube Style) on how to calculate distance between 2 points.
- Interative Distance Formula Explore the distance formula by clicking and dragging two points.
- Pictures of the Distance Formula
- Distance Formula Calculator