Download Geometry Chapter 1 Study Guide Terms Line: Through any two

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Geometry Chapter 1
Study Guide
I.
Terms
A. Line: Through any two points exists exactly one line. Lines have no defined endpoints.
B. Collinear: Points on the same line
C. Plane: Through any three noncollinear points form exactly one plane.
D. Line Segment: A part of a line with two defined endpoints
E. Ray: A part of a line with one defined endpoint and an arrowhead describing the
direction of the ray.
F. Opposite Rays: Form a line
G. Angle Types:
1. Acute Angles are less than 90˚
2. Obtuse Angles are greater than 90˚ but less than 180˚
3. Right Angles are equal to 90˚
4. Straight Angles are equal to 180˚
II.
Formulas and Postulates
A. Segment Addition Postulate
1. If B is between A and C, then AB + BC = AC
2. If AB + BC = AC, then B is between A and C
A
B
C
3. Examples:
a. Find XZ
X
23
Y
50
Z
b. Find GH
F
37
144
G
H
c. Find AB
36
A
-2x + 12
B
4x + 20
B. Angle Addition Postulate (Same as Segment Addition Postulate above)
C
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