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Geometry 27 January 2014

Geometry 27 January 2014. WARM UP 1) Complete Using Congruent Triangles handout 2) Place Khan video notes on top of group folder FINISHED? Work on Geometry Proof Practice Review- Triangle Congruency Shortcuts SSS, SAS but not SSA SAA (AAS), ASA but not AAA

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Geometry 27 January 2014

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  1. Geometry 27 January 2014 WARM UP 1) Complete Using Congruent Triangles handout 2) Place Khan video notes on top of group folder FINISHED? Work on Geometry Proof Practice Review- Triangle Congruency Shortcuts SSS, SAS but not SSA SAA (AAS), ASA but not AAA CPCTC- corresponding parts of congruent triangles are congruent!

  2. Objective Students will be able to prove and apply polygon properties. HOMEWORK- DUE FRIDAY pg. 283: 1 – 6; pg. 304: 7 – 12; pg. 300: 1, 3, 4 Properties of Parallelograms Handout UNIT 5 TEST- FRIDAY We will NOT have time to go over homework questions before the test. ANSWERS will be posted Wed/Th– see me w/ ?’s

  3. Complete Properties of QUADRILATERALS Handout Think- Fill in as many properties of sides/ angles/ diagonals as you can PAIR- TRADE- trade with a partner– do you see more they need to add? Use a different color. SHARE- whole class review

  4. A kite is a quadrilateral that has two pairs of consecutive congruent sides, but opposite sides are not congruent. Definition of kite

  5. Properties of Kites

  6. Properties of Trapezoids Consecutive angles between the bases are supplementary.

  7. Base angles of isosceles trapezoids are congruent. ⦟P  ⦟S and ⦟Q  ⦟R

  8. Isosceles Trapezoids

  9. if a quadrilateral is a parallelogram • opposite sides are parallel (DEFINITION) • opposite sides are congruent • opposite angles are congruent • consecutive angles are supplementary • diagonals bisect each other

  10. Rhombus Properties Rhombuses share all properties of a parallelogram AND: (1) Consecutive sides of a rhombus are congruent. (2) The diagonals of a rhombus bisect pairs of opposite angles. (3) The diagonals of a rhombus are perpendicular.

  11. Rectangle Properties All properties of a parallelogram AND: • Diagonals are congruent • All angles are congruent (90⁰)

  12. deductive reasoning the process of showing that certain statements follow logically from agreed-upon assumptions and proven facts. Inductive reasoning allows you to discover new ideas based on observed patterns. Deductive reasoning can help explain why your conjecture is true.

  13. Got Proof? Logically step by step– what is true? why? statement  reason THREE styles- flowchart, two-column, paragraph Let’s practice– Complete Geometry Proof Practice Handout FIRST- MARK the diagram with GIVEN information and HIDDEN congruencies!! Be ready to present your work to the class.

  14. WHOLE CLASS • Complete Properties of Polygons Handout SKETCHES and Conjectures for Parallelograms FINISHED? do the proof on the back

  15. Debrief What is easy? What still might be confusing to some students?

  16. Geometry 28 January 2014 WARM UP- on your pink sheet • Find m⦟T 2) FINISHED? Work on geometry Proof Practice

  17. Objective Students will be able to prove and apply polygon properties. HOMEWORK- DUE FRIDAY pg. 283: 1 – 6; pg. 304: 7 – 12; pg. 300: 1, 3, 4 Properties of Parallelograms Handout UNIT 5 TEST- FRIDAY We will NOT have time to go over homework questions before the test. ANSWERS will be posted Wed/Th– see me w/ ?’s

  18. Review 1: Trapezoids a) 5 b) 24 c) 48 What is x?

  19. Review 2 In a rectangle ABCD, if AB = 7x – 3, and CD = 4x + 9, then x = ___ (strategy– draw a sketch) A) 1 B) 2 C) 3 D) 4 E) 5 7x – 3 = 4x + 9 -4x -4x 3x – 3 = 9 + 3 +3 3x = 12 x = 4

  20. Review 3 • The perimeter of a square MNOP is 72 inches, and NO = 2x + 6. What is the value of x? A) 15 B) 12 C) 6 D) 9 E) 18

  21. FLOW CHART PROOF 1. Restate given information clearly. Mark the information on a sketch. Write the given information on the left. 2. State what you are trying to show. 3. Fill in the other boxes working backwards and forwards as needed. 4. ARROWS are used to connect information directly resulting from a previous statements. Thinking FLOWS left to right.

  22. 1. Given: parallelogram SOAK with diagonal Show: Def. of parallelogram AIA SOAK is a parallelogram ASA GIVEN AIA Def of parallelogram same segment

  23. KHAN Quiz Work silently. Do your best. FINISHED? Work on Geometry Proof Practice FINISHED? Work on 5.3 et. al. handout Be ready to present your work to the class.

  24. Debrief What is easy? What might still be confusing to some students?

  25. Geometry 29/ 30 January 2014 EMPTY Group Folders • Look over your work from last week on the “Four Pentagons” Problem • Correct or finish your work as needed Please RESPOND to the prompts I wrote on your paper. You may use the 2nd clean sheet to re-work the problem as needed. FINISHED? DO HW pblm pg. 300, #4.

  26. Objective Students will be able to prove and apply polygon properties. HOMEWORK- DUE FRIDAY pg. 283: 1 – 6; pg. 304: 7 – 12; pg. 300: 1, 3, 4 Properties of Parallelograms Handout UNIT 5 TEST- FRIDAY We will NOT have time to go over homework questions before the test. ANSWERS will be posted Wed/Th– see me w/ ?’s

  27. Review Chapter 5 Quiz 2 What errors did you make? CORRECTONS for up to ½ credit accepted through February 6. Follow pink slip guidelines! DISCUSS- Parallelogram Proofs on Geometry Proof Practice REVIEW- Khan Quiz from yesterday

  28. PQRS is an isosceles trapezoid. Find m<P, m<Q, and m<R. S R > 50° > P Q base angles are congruent m<R= 50⁰ consecutive angles are supplementary m<Q=m<P= 180 – 50 = 130º check: 2(50) + 2(130) = 100 + 260 = 360√

  29. REVIEW 1 a = x= y=

  30. Review 2 • Find m<A A) 65° B) 135° C) 100° D) 90° E) 105° B A 165° C 30° 65° D

  31. Review 3 • Opposite angles of a parallelogram must be _______. A) complementary B) supplementary C) congruent D) A and C E) B and C

  32. Review 4 • If a quadrilateral has four equal sides, then it must be a _______. A) rectangle B) square C) rhombus D) A and B E) B and C

  33. Review 5 • The perimeter of a square MNOP is 96 inches, and NO = 2x + 6. What is the value of x? A) 15 B) 12 C) 9 D) 6 E) 3

  34. Review 6 • ABCD is a trapezoid. Find the length of midsegment EF. A) 5 B) 11 C) 16 D) 8 E) 22 13 A E 11 B 5 D F C 9

  35. Review 7 • The quadrilateral below is most specifically a __________. A) rhombus B) rectangle C) kite D) parallelogram E) trapezoid

  36. Summarize Properties of Quadrilaterals Mark/ briefly summarize properties of each quadrilateral on handout. REMEMBER- each shape has ALL the properties of the classification above it. Quadrilateral Kite Parallelogram Trapezoid Isosceles Trapezoid Rhombus Rectangle Square

  37. Let’s PRACTICE COMPLETE 5.3 Handout for classwork. SOME answers are posted. Be ready to present your work. FINISHED? Begin Instructional Task: Applying Angle Theorems- Four Pentagons

  38. Debrief What do you need to do to be ready for the test on Friday?

  39. Geometry Unit 5 TEST31 January 2014 Do you best. Work silently. You have the whole period to complete the test. READ the problems carefully. SHOW supporting work for ALL PROBLEMS!!! HOMEWORK DUE SUNDAY- KHAN ASSIGNMENT

  40. TEST postponed due to low attendance HOMEWORK QUESTIONS? Polygon Properties Practice- Practice Handout White Board Review

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