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Geometry October 17, 2016 2-6: Proving Angles Congruent
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DO NOW 1.Solve for x. 2. Name the property illustrated in each case. a.b.
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Agenda Announcements (2 nd hour only) Do Now Review from Friday
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Objective/Big Question How do we use basic angle relationships to prove that two angles are congruent?
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REVIEW: Properties REFLEXIVE PROPERTY: Everything is congruent to itself SYMMETRIC PROPERTY: You can “flip” equalities and congruencies TRANSITIVE PROPERTY: If two things are both congruent to a third thing, they’re congruent to each other SUBSTITUTION: If two values are equal, you can swap them out
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REVIEW: Properties
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Let’s look at angles!
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NOTES: Vertical Angles Theorem How can we PROVE this?
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NOTES: Vertical Angles Theorem
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NOTES: Congruent Supplements
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NOTES: Congruent Complements
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Exercise: Proof
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Practice time!
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