For questions 1-10, classify the each statement as true or false.

1. and k are intersecting lines.

2. A, R, and T are collinear.

3. is the intersection of planes P and Q.

4. A, B, S, and Y are coplanar.

5. Plane P contains k.

6. T, S, and B are coplanar.

7. intersects plane Q at S.

8. A, R, S and T are noncoplanar.

9. name the same line.

10. A, R, and B are collinear.

TRY IT OUT! SEE HOW MANY YOU CAN GET!

ANSWERS

1. False2. False3. True4. True5. False6. True7. False8. True9. True10. True

If you missed any, go back and see if you can figure out why.

POSTULATES (ALSO KNOWN AS AXIOMS) Statements that are

accepted without proof.

You will need to learn the postulates as we go.

I recommend writing them on cards and keep them where you can review them each day.

Every word in postulates and theorems is important. Leaving one out or changing it can sometimes change the meaning.

Certain postulates and theorems you will need to memorize. I will let you know which ones those are as we go.

POSTULATES 1-1 AND 1-2

POSTULATES 1-3 AND 1-4

THE RULER POSTULATE KNOW HOW TO USE IT!

SEGMENT ADDITION POSTULATE**MEMORIZE IT!

(We will use this postulate over 1000 times this year.)

This is in the real number system where we can “add” numbers, since we cannot “add” objects.