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GBK Geometry

GBK Geometry. Jordan Johnson. Today’s plan. Greeting Syllabi? Prewrite / Supplies Check Rules Wrap-up Review Surfer/Spotter Problems Lesson: Basic Objects & Dimensions Homework / Questions Clean-up. Supplies. Take out and be ready to show me… compass ruler protractor

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GBK Geometry

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  1. GBK Geometry Jordan Johnson

  2. Today’s plan • Greeting • Syllabi? • Prewrite / Supplies Check • Rules Wrap-up • Review Surfer/Spotter Problems • Lesson: Basic Objects & Dimensions • Homework / Questions • Clean-up

  3. Supplies • Take out and be ready to show me… • compass • ruler • protractor • notebook/graph paper • 3 colors of pen or pencil • 1 or 2 composition books

  4. Quick pre-write(Name, Date, Period @ top-right) • What do you know about… • …points? • …lines? • …line segments? • …planes? (Not the flying kind…) • If you know these words, tell what they mean: • collinear / noncollinear • coplanar / noncoplanar • concurrent • What happens when lines or planes intersect?

  5. Rules • Review the rules cards: • Are they rules we can agree on? • Are they written neatly enough? • Is anything missing?

  6. The Surfer • Goal: • Minimize the sum of the distances from his house to the sides of the island. • Note: • The shortest path from the house to a side is perpendicular to the side.

  7. The Surfer • Example. • This time you can measure them.

  8. The Surfer • Using your triangle from yesterday or a new one (12cm on each side) as a model: • Choose several points on the island • For each point: • Measure the distance to each side (again, perpendicular!) • Add up the distances. • What do you believe is the best place for the house? • …and how many km of path must the surfer clear? • What about the worst place? • …and how many km to clear from there?

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

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