Chpt 1 L2 using undefined terms.notebook
September 08, 2014
Do Now:
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Chpt 1 L2 using undefined terms.notebook
September 08, 2014
What is a postulate?!
How is this different than a theorem?
Draw a Picture ‐‐‐> Make a Conjecture:
*Through any two points there is exactly one _________.
*If two lines intersect, then they intersect in exactly one _________.
*If two planes intersect, then they intersect in exactly one __________.
*Through any three __________ points there is exactly one _________.
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Chpt 1 L2 using undefined terms.notebook
September 08, 2014
Putting it together:
a) Which plane contains points N, P and Q?
b) Which plane contains points J, M and Q?
c) What is the name of a line that is coplanar with JK and KL?
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Chpt 1 L2 using undefined terms.notebook
September 08, 2014
Your Turn! work in pairs on the following problems 4
Chpt 1 L2 using undefined terms.notebook
September 08, 2014
POINTS: graphing and proving
1. Label the quadrants
2. Graph the following points and
DR
AW
A _
__
note which quadrant they are in
(2,3)
(1,­2)
(­3,1)
(­1,­2)
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Chpt 1 L2 using undefined terms.notebook
September 08, 2014
Vocabulary Connection:
THINK: Does the point (1,1) lie on the line? How could I prove this algebraically if I know that the equation of the line is y=2x‐1 ?
GUIDED PRACTICE: How can I prove that the points A (0,3) and B (1,‐1) lie on the graph of the line y=4x+3 ?
YOUR TURN: Are the following points collinear to points A and B?
c) (1, 2)
d) (‐3, ‐4)
e) (‐5, ‐2)
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Chpt 1 L2 using undefined terms.notebook
September 08, 2014
IF YOU NEED HELP :)
http://www.brightstorm.com/math/geometry/geometry­building­blocks/three­
undefined­terms­point­line­and­plane/
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