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Do now 2-26-13

Do now 2-26-13. New seats What kind of angles are alternate exterior angles? Same One acute and one obtuse Equal 180 Both a and b. Review from Monday. What is the sum of the exterior angles of polygons? 360

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Do now 2-26-13

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  1. Do now 2-26-13 • New seats • What kind of angles are alternate exterior angles? • Same • One acute and one obtuse • Equal 180 • Both a and b

  2. Review from Monday • What is the sum of the exterior angles of polygons? • 360 • What conclusion can be made about the interior and exterior angles of a polygon at each of its vertices? • Supplementary

  3. Review from Monday How do quadrilaterals, congruent triangles, and parallel lines coincide? Or have a relationship together? Triangles and lines have 180 degrees in common Try, pg. 181 #15, #16, and #18 Pg. 209 #25, #26

  4. congruence Chapter 4.1 pearson Parallel lines and congruent figures http://youtu.be/VY-8jMnFkuM http://youtu.be/69lfTURDles

  5. polygons http://youtu.be/hBdiR8dwY_8 Each student gets 2 shapes or their own bag of shapes pg. 218- 224 Trace each shape Label each angle/vertex Identify congruent corresponding sides and angles (parts) Definition: Third angle thm: if two congruent, then third is congruent

  6. Proofs (you do, then we check) Given triangle QXR is congruent to triangle NYC Then line segment QX is congruent to line segment ______

  7. Lesson check pg. 221 1 – 7

  8. Textbook work to make sure you have done Pg. 176 #26 Pg. 356 #7, 15, Pg. 357 #28, 30 Pg. 358 #47

  9. Summary 2-26-13 How do you show that two triangles are congruent? Provide one way with description

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