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Opener 1-10-12

Opener 1-10-12. In a parallelogram one angle is 9 times the size of another. Find the measure of the angles and their supplements. Using the Information Given design a proof to show that opposite angles are congruent. . Opposite angles in a Parallelogram are Congruent. . Prove It: .

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Opener 1-10-12

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  1. Opener 1-10-12 In a parallelogram one angle is 9 times the size of another. Find the measure of the angles and their supplements. Using the Information Given design a proof to show that opposite angles are congruent.

  2. Opposite angles in a Parallelogram are Congruent.

  3. Prove It: • Using 2 column • Paragraph Proof • Using Flow Chart

  4. Paragraph Proof • Given: ABCD is a Parallelogram • Prove: Angle A Congruent to Angle C Angle B Congruent to Angle D Opposite sides of a parallelogram are congruent, so _______ and ________. By Reflexive Property of Congruence, ________. Triangle ABD is congruent to Triangle CDB because of the _______ Congruence Postulate. Because _______ parts of congruent triangles are congruent. Angle A Congruent Angle C

  5. Two Column Proof • http://www.teachertube.com/viewVideo.php?video_id=20743&title=Proof___Opposite_Angles_of_a_Parallelogram_are_Congruent

  6. T Prove: G • Given: Parallelogram LENS and Parallelogram NGTH • Prove: • Angle L Congruent Angle T • LS Parallel to GT • Angle E supplementary to Angle T H N E S L

  7. Exit Slip • Pick One of the following Pg. 317 in Textbook: # 48 #49 #50

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