1. Bellwork: Pick up the sheet on the brown table. Carrie Less took her first Geometry quiz. Unfortunately, she did poorly. Of the 7 problems she worked, 4 contain an error. With your PARTNER, read through her work carefully and determine where her mistake occurred and correct the error.

2. 1.3a Distance and Midpoints Students will be able to find the distance and midpoint of a segment on a number line. Students will be able to find the midpoint on the (x, y) coordinate plane.

3. Example 1 Find AB.

4. Distance Formula (# line) Take the difference of the two endpoints. Answer is ALWAYS positive.

5. Example 2 Find ST and UV.

6. Congruent (Defn) Segments that are the same measure are said to be congruent ( ).

7. Midpoint (Defn) If a point is the midpoint, then it divides a segment into two congruent segments. What can you conclude if B is the midpoint of ?

8. Example 3 Find the coordinate of the midpoint of.

9. Midpoint Formula (# line) Add the two endpoints together and divide by 2.

10. Example 4 Find the midpoint of.

11. Midpoint Formula The midpoint of a segment with endpoints (x 1, y 1 ) and (x 2, y 2 ) is:

12. Example 4 Find the midpoint of.

13. Example 5 Find the midpoint of a segment with endpoints (2, -3) and (8, -4).

14. Ticket to leave: 1.Name two congruent segments. Use the correct notation for congruent. 2.What is the midpoint of a segment with endpoints (5, -1) and (-2, 3)?

15. Homework Pg. 26 # 11 – 15, 27 – 41, 65 ALL ODD Quiz Friday over sections 1.1-1.3