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GBK Geometry

GBK Geometry. Jordan Johnson. Today’s plan. Greeting Review Asg #59: Ch. 9, Lesson 2 (pp. 345-348): Set I Exercises 5-6, 11-27. Set II Exercises 28-29, 53-57. Bonus : Set III. Area Plan New Puzzle Homework / Questions Clean-up. Puzzle: Cube Dissection.

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GBK Geometry

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  1. GBK Geometry Jordan Johnson

  2. Today’s plan • Greeting • Review Asg #59: Ch. 9, Lesson 2 (pp. 345-348): • Set I Exercises 5-6, 11-27. • Set II Exercises 28-29, 53-57. • Bonus: Set III. • Area Plan • New Puzzle • Homework / Questions • Clean-up

  3. Puzzle: Cube Dissection • Suppose you have a 3” x 3” wooden cube and want to saw it into twenty-seven 1” x 1” cubes. • What is the minimal number of cuts needed?

  4. Tasks / Homework • Journal #19 – turn in today. • Study for Monday’s re-test (on Unit 8, QLs) • Definition of each kind of QL: parallelogram, rectangle, rhombus, square, kite, dart, trapezoid, isosceles trapezoid, concave/convex. • Relationships of QL types: • All squares are rectangles & rhombuses. • All rhombuses are kites. • All rectangles & rhombuses are parallelograms. • All parallelograms are isosceles trapezoids. • All trapezoids. • Features of parallelograms & trapezoids. • For Tuesday: 20 minutes to conjecture & prove: • Midsegment theorems • Area of right triangles? Other triangles?

  5. Clean-up / Reminders • Pick up all trash / items. • Push in chairs (at front and back tables). • See you tomorrow!

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