1. Lines Tangent to Circles Making Inferences

2. 2 Minutes – 1 Per Pair Pick up: MarkerYardstickProtractor Glue Stick Scissors Orange Paper Do: Hang circle paper on top 1/3 of poster paper Leave supplies, return to your seats

3. Tangent Lines Let’s practice drawing lines tangent to a circle

4. Picture Instructions With your partner, complete the checklist part of your paper. DON’T do the bottom part yet. STOP after you’ve measured degrees and labeled on your poster. 10 minutes

5. Gallery Walk Tour the room...observe the other findings Return to your poster, and complete the rest of the Picture Instructions Sheet 6 minutes Return your supplies Return to your seats

6. Group Discussion What inferences can we make about circles and tangent lines? Use geometric vocabulary!

7. Our Inferences If a line is tangent to a circle, then the line is perpendicular to the radius at the point of tangency. If two tangent segments to a circle share a common endpoint outside the circle, then the two segments are equal.

8. Problems, problems, everywhere! Become an expert on your assigned problem. Be ready to share with the class by using the document camera to show your thinking.

9. Exit Slip Complete and hand in as you leave. Thank you for being willing to learn today!