Journal 1

1
Journal 1

• Chapter 2 Sec 1
• Conditional Statements
• (Postulates)

2
Postulates

• Through any two points there is exactly one line
• A line contains at least two points.
• If two lines intersect, then they intersect in
  exactly one point.
• Through any three noncollinear points there is
  exactly one plane.

3
Postulates

• A plane contains at least three noncollinear
  points.
• If two points lie in a plane, then the line that
  contains the points is in that plane.
• If two planes intersect, then their intersection
  is a line.

4
True or False

• A given triangle can lie in more than one plane.
• Any two points are collinear.
• Two planes can intersect in only one point.
• Two lines can intersect in two points.

false
true
false
false
5
More True/False

• A postulate is a statement assumed to be true
  without proof.
• The phrase exactly one has the same meaning as
  the phrase one and only one.
• Three points determine a plane.
• Through any two points there is exactly one
  plane.
• Through a line and a point not on the line there
  is one and only one plane.

true
true
true
false
true
6
Homework 2.1