1. Today we will:
Start the Spiral TAKS Review #1 question 2 and 3 ONCE WE ENTER THE CLASSROOM.

2. Undefined Terms
Point
No Dimension
Represented as a dot

3. Undefined Terms Line C B Line l It has 2 arrowheads Endless
Represented as line l,
line BC, or BC

4. Undefined Terms Plane M Two dimensional EndlessB C
Two dimensional
Endless
Called Plane M or Plane ABC

5. Defined Terms Ray Like a line, but has an endpoint and 1 arrowhead
1 direction

6. Defined Terms
Segment
Like a line, but has endpoint

7. EXAMPLE 1
Name points, lines, and planes
a. Give two other names for PQ and for plane R.
b. Name three points that are collinear.
Name four points that are coplanar.
SOLUTION
Other names for PQ are QP and line n Other names for plane R are plane SVT and plane PTV.

8. EXAMPLE 2
Name segments, rays, and opposite rays
a. Give another name for GH .
b. Name all rays with endpoint J . Which Which of these rays are opposite rays?
SOLUTION
a. Another name for GH is HG .
b. The rays with endpoint J are JE , JG , JF , and JH The pairs of opposite rays with endpoint J are JE and JF , and JG and JH .

9. GUIDED PRACTICE
for Example 1
Use the diagram in Example 1. Give two other names for ST . Name a point that is not coplanar with points Q, S, and T.
ANSWER
Other names for ST are TS and PT. Point V is not coplanar with points Q,S and T

10. GUIDED PRACTICE
for Example 2
2. Give another name for EF
ANSWER
Another name for EF is FE
3. Are HJ and JH the same ray ? Are HJ and HG the same ray? Explain.
ANSWER
No; HJ and JH have different endpoints, so they are not the same ray
Yes; points J and G lie on the same side of H, so they are the same ray

11. Exit ticket
Define a plane, line, segment, and ray. Give me an example and make sure you have the symbols correct!

12. You come to a fork in the road
You come to a fork in the road. One path leads to riches and happiness, the other, to death and destruction. Standing at the fork in the road there are two brothers, one always lies, and one who always tells the truth. You don’t know which brother tells the truth, and which lies. If you could ask only one question, and you have to be sure you are on the right path before you start down the path, what question do you ask the brothers?