GBK Geometry

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# GBK Geometry - PowerPoint PPT Presentation

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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Presentation Transcript

### 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
• notebook/graph paper
• 3 colors of pen or pencil
• 1 or 2 composition books
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?
Rules
• Review the rules cards:
• Are they rules we can agree on?
• Are they written neatly enough?
• Is anything missing?
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.
The Surfer
• Example.
• This time you can measure them.
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?
Clean-up / Reminders
• Pick up all trash / items.
• Push in chairs (at front and back tables).
• See you tomorrow!