1. Geometry Notes Week 1

2. Notes –Vocabulary DAY1 Point: It has location and nothing else. No size. No height. No depth. No friends. Line: A straight, unbroken set of points that goes on forever. It has infinite length but no thickness. Plane: A surface with length and width but no thickness.

3. Notes Vocabulary Line Segment: A line that has two endpoints. Ray: A line with ONE endpoint. Collinear: On the same line Coplanar: On the same plane

4. Ex: DAY 2 - Congruency Congruent Equal = Numbers AB Shapes What we CAN write: What we CAN’T write:

5. H B D A C G F What do the markings indicate? What type of triangle has been formed? What are two statements of congruency that you can write from the quadrilateral?

6. F EFD DFE 1 E F 1 D Notes - Basic Angles What We Can Write Vertex: The common endpoint of the two rays of an angle.

7. C F DFC CFD 1 EFD DFE CFE 2 EFC E 1 2 F D What We Can Write Notes - Basic Angles What We Can’t Write

8. 2. Notes - Basic Angles E F D

9. 2. Notes - Basic Angles F D E

10. 28° B C A Angle Bisector: A ray that extends from the vertex of an angle and divides it into two congruent angles. 14° D 14° AD is the angle bisector of BAC. BAD DAC What We Can Write

11. A is the midpoint of DE DAY 3 - Midpoint Midpoint: The point on a segment that’s the same distance from both endpoints. D is the midpoint of BC H is the midpoint of FD

12. (7,8) (3,2) Midpoint Formula - How do we find the exact center of a line segment?

13. Conjecture 1: Midpoint Conjecture If your points are and then your midpoint is: 2. Notes - Midpoint Formula How do we find the exact center of a line segment?

14. (7,8) (5,5) 2. Notes - Midpoint Formula Let’s make it work for us. (3,2)

15. (-9,2) (7,-6) (-1,-2) 2. Notes - Midpoint Formula One more time.