GBK Geometry

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# GBK Geometry - PowerPoint PPT Presentation

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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Presentation Transcript

### GBK Geometry

Jordan Johnson

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

How big is it?

Locate and estimate the area of:

rectangles

triangles

trapezoids

parallelograms

Add up areas to estimate the total floor space.

Homework
• 25+ minutes tonight:
• Practice finding areas.
• Pentagon
• Asg #65