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GBK Geometry

GBK Geometry. Jordan Johnson. Today’s plan. Greeting Hand in Papers Finish Surfer Proof Write-up Review: Area Homework / Questions Clean-up. Hand in Your Proof Analysis. Hand in, stapled together (in this order from top to bottom): Final paper Two rubrics Draft paper. Area Review.

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GBK Geometry

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  1. GBK Geometry Jordan Johnson

  2. Today’s plan • Greeting • Hand in Papers • Finish Surfer Proof Write-up • Review: Area • Homework / Questions • Clean-up

  3. Hand in Your Proof Analysis • Hand in, stapled together (in this order from top to bottom): • Final paper • Two rubrics • Draft paper

  4. Area Review • Find the area of: • ΔPQR (assuming each square is 2’ on a side) • Rhombus ABCD. • ΔCED in rhombus ABCD. • Show two ways to find AABCE. • If you have a triangle with side lengths of 4, 7, and 8, what kind of triangle is it?

  5. Test tomorrow • For tomorrow, know: • Definitions of base and corresponding altitude • Recognize bases & altitudes of triangles, trapezoids, and parallelograms • Area formulas • Be able to choose and use • Use in area-by-dissection problems • 1 proof at the end

  6. How big is it? Locate and estimate the area of: rectangles triangles trapezoids parallelograms Add up areas to estimate the total floor space.

  7. Homework • 25+ minutes tonight: • Practice finding areas. • Pentagon • Asg #65 • Khan Academy area problems

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

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