Warm Up

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Use Postulates and Diagrams
Warm Up
Lesson Presentation
Lesson Quiz
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Warm-Up
State which postulate justifies each statement.
2. If M is between X and Y, then XM MY XY.
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Warm-Up
State which postulate justifies each statement.
3. Find the measure of MN if N is between M and
P, MP 6x 2, MN 4x, and MP 16.
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Example 1
State the postulate illustrated by the diagram.
SOLUTION
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Example 2
Use the diagram to write examples of Postulates 9
and 10.
SOLUTION
Postulate 9 Plane P contains at least three
noncollinear points, A, B, and C.
Postulate 10 Point A and point B lie in plane
P, so line n containing A and B also lies in
plane P.
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Guided Practice
Use the diagram.
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Example 3
SOLUTION
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Example 4
A, B, and F are collinear.
E, B, and D are collinear.
SOLUTION
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Guided Practice
In Exercises 3 and 4, refer back to Example 3.
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Guided Practice
In Exercises 3 and 4, refer back to Example 3.
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Guided Practice
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Lesson Quiz
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Lesson Quiz
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Lesson Quiz
Use the diagram to determine if the statement is
true or false.