MATH 7200 Discussion Points, Section 1.1
Euclidean Parallel Postulate.
Through a given point not on a line l there is exactly one line parallel to l.
Hyperbolic Parallel Postulate
Given a line l and a point P not on l, there exist at least two lines through P that are parallel to l.
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1.1 Angles and their Measurement
Pairs of Angles
Adjacent angles
Vertical angles
Supplementary angles
Complementary angles
Acute Angle
Obtuse Angle
Right Angle
Straight Angle
Congruent
Notation Conventions
Theorem 1.1
Proof (b)
Proof (c)
EXAMPLE 1 --- This is the proof presented in the text. Are there any questions?
