Warm-Up

•Get out your foldable from yesterday and fill in Postulates 1.1-1.4

• You can find them in your book on pages 13-15

• You have until 2:05 to finish

Homework Review

Homework Review• 22. Plane VWX, Plane VWS

• 33. Answers may vary

• 34. Not Possible

• 35. Answers may vary

• 36. Not Possible

• 38. You can represent a plane using a four sided figure. However, planes do not have boundaries, so they extend past the drawn edges without end.

• 40. always

• 41. sometimes

• 42. always

• 43. sometimes

• 44. always

Section 1.3 Measuring Segments

SWBAT find and compare lengths of segments

Postulates

• Use your book to fill in Postulates 1.5 and 1.6

• Make sure as you do this that you are understanding what it says… if not then ask for help!

Let’s talk about Postulate 1.5

• The distance between any two points is positive (remember absolute value?)

Example

• Find the length of AB and BC

Definition

Question 1

•Determine if the segments GH and HI are congruent

• A. Yes

• B. No

• C. What does congruent mean?

Example

•Given: ST = 3x + 3 and TU = 2x + 9.

• a. What is the value of ST?

• b. What is the value of TU?

Question 2

• Given: ST = x + 3 and TU = 4x 6. What is the value of ST?• A. 3

• B. 6

• C. 12

• D. x = 3

• E. Please go over this

Segment Addition Postulate

• Part 1 + Part 2 = Whole

Example

• If PM = 19 and MN = 23, find PN

Question 3

•If PN = 29 and MN = 13, find PM

•A. 16

•B. 42

•C. 2

•D. 13

Definition

• The midpoint of a segment is a point that divides the segment into two congruent segments

Question 4

Definition

•A ray, line, point, or other segment that intersects a segment at its midpoint is called a segment bisector.

Example

Question 5

• If AD = 20 and AC = 3x + 4, find the value of x.

• A. 12

• B. 20

• C. 40

• D. x