Warm up (draw each one)

1
Warm up (draw each one)

• 1) Vertical line m intersects a horizontal plane
  M at point O.
• 2) Horizontal plane P contains two lines k and n
  that intersect at point A.
• 3) Vertical planes X and Y intersect at line AB.
• 4) Point P is not in plane N.

2
1.3 Segments, Rays, and Distance
3
Segments

• A line with two endpoints.
• It consists of the two endpoints and those points
  in between.
• A
• B

LABEL
4
Rays

• A ray has one endpoint and extends out endlessly
  in one direction.
• The endpoint (A) is always named first.

LABEL
B
A
5
Number Line

• COORDINATE number associated with a letter
• Coordinate of M?
• Coordinate of J?

7
-4
6
Distance

• The distance of a segment length
• LABEL JA ? AM ?

5
6
7
Segment Addition Postulate

• If B is between A and C, then AB BC AC

A
B
C
8
CONGRUENCE

• CONGRUENT two objects that have the same size
  and shape
• Congruent Segments segments with equal lengths.

12.4
12.4
9
MIDPOINT

• Midpoint of a Segment
• is the point that divides the segment into two
  congruent segments.

10
BISECTOR

• Bisector of a segment
• is a line, segment, ray, or plane that intersects
  the segment at its midpoint.

11
Find x if RA 2x 4, AY 3x 1, and RY 30.

Z
R
2x 4
A
3x 1
Y
30
2x 4 3x 1 30
C
5x 5 30
- 5 - 5
5x 25
/5 /5
x 5
12
PRACTICE

• Page 14
• Classroom Exercises
• 1 20