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3rd block: D.E.A.R 15 minutes • Midterm is on Monday 3/25 for 3rd block & 4th block, so you could be studying during D.E.A.R • Tips: make flashcards, study vocabulary/concepts, and work on practice problems Do now 3-18-13 • • • • Midterm is Friday 3/22/13 for 2nd block Midterm is Monday 3/25/13 for 3rd & 4th block Lines and angles questions: 1. line c is parallel to d, with corresponding angles being 55 degrees and (3w – 2), what is the value of w and what is the degree? • 2. pg. 163 #52 Unit 5 Similarity & right triangle similarity Where are proportions used? • Math • Cooking • Statistics in games Purpose of unit 5 • Prove line intersecting a triangle is parallel to one of the sides, then it divides the other two sides of that triangle proportionally • Prove that if a line divides two sides of a triangle proportionally, then it is parallel to the 3rd side • Vocabulary to know: parallel lines, similar triangles, angle-angle similarity, proportion Video to discuss similarity, right triangles, and other triangle concepts • Section B: Right Triangles, Altitudes, the Pythagorean Theorem, and You • http://app.discoveryeducation.com/ search?Ntt=section+B%3A+Right+tri angles%2C+altitudes%2C+the+pytha gorean+theorem+and+you Triangle similarity parts • Angle – angle similarity postulate pg. 450 – Uses: If…..then statement • Side-angle-side similarity pg. 451 – Sides must surround angle OR angle between sides • Side-side-side similarity pg 451 – Corresponding sides of 2 triangles are proportional then similar To determine similarity in 2 triangles • Measure the side lengths and show proportional • OR • Use triangle sum theorem to find missing angle measures Practice • Pg 451 AA, SSS, SAS • Proof practice (statement/reason table) – Pg. 453 discuss example – Pg. 453 try one by self or with partner midpoint & proportionally • Investigating midsegments pg. 284 • Triangle midsegment thm pg. 285 – Together do problem task (pg 6 unit 5 packet) • Problem #1 pg. 286 • Lesson check pg. 288 j.mp/msburns • j.mp/msburns choose Geometry Syllabus, assignment table • 7-4 challenge due 3/20 – extra credit • 7-5 challenge due 3/20 – extra credit • Tips for midterm: make flashcards, study vocabulary/concepts, and work on practice problems Summary 3-18-13 • In Geometry we need to prove answer, therefore where else do we need to prove things, explain? (name specific places)