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bell ringer 1. What do you know about triangles? How many degrees? Types? 2. What do you know about parallel lines? Their slopes? 2. What do you know about perpendicular lines? Their slopes?
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angles & Lines Monday, October 31, 2016
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angles What makes an angle acute? right? obtuse? straight? reflex?
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angles What is the sum of the degrees of a linear angle pair? Are these angles complementary or supplementary?
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Examples
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angles What is it called when you cut an angle in half?
Vertical Angle Theorem – What is true about vertical angles?
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Examples PT bisects ∠T.
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angles Angle Sum Theorem – How many degrees?
Exterior Angle of a Triangle – How does it relate to the two remote interior angles?
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Examples
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lines How do you know if points are on a perpendicular bisector of a line segment? What is true about a midsegment?
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Examples
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parallel lines cut by a transversal
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Linear Pair postulate p. 111
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Example
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vertical angles theorem
p. 112 1 3
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Example
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alternate interior angles theorem
p. 143 3 5
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Example
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alternate exterior angles theorem
p. 143 1 7
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Example
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consecutive interior angles theorem
p. 143 3 6
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Example
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consecutive exterior angles theorem
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Example
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corresponding angles postulate
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Example
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parallel lines cut by a transversal
Converses are true…that’s how you can prove lines are parallel. (p. 150)
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Examples
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exit ticket What angle pairs are formed when parallel lines are cut by a transversal? Homework Parallel Lines cut by a Transversal STUDY Notes & Examples (will be tested even if not practiced on homework)
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