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Perimeter and area revised
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Perimeter and area revised

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Transcript

  • 1. Perimeter and Area By F. West
  • 2. ObjectivesStudents will understand the meaning of perimeter & areaand apply it in problems. GLEC Standards and BenchmarksM.UN. 03.05 II .3.23 grade math
  • 3. Learning Resources and MaterialsRulerGraph paper
  • 4. Methods and ProcedureThe teacher will introduce vocabulary, and demonstrate how tosolve perimeter and area problems.
  • 5. IntroductionStep 1. Activate Prior KnowledgeWhat do you know about perimeter and area?
  • 6. What is perimeter?The distance measured around an object.
  • 7. Look at the objects belowYou can use a ruler to measure shapes.
  • 8. Perimeter Use the graph paper to draw some triangles and measure them.
  • 9. PerimeterThe formula to solve a triangle is P = a+b+c
  • 10. PerimeterA B C
  • 11. Find the Perimeter10cm 10cm 8cm 8cm 10cm 8cm
  • 12. What is the area?The number of square units needed to cover a shape
  • 13. What is the formula to solve thearea of a triangle?A=½ hxb or A= hxb 26cm 4cm
  • 14. Area
  • 15. Find the Area 5cm 3cm 4cm 4cmArea = Area =
  • 16. Find the perimeterP= 2L+2W 55 5 5
  • 17. Find the Perimeter 5cm 11cm 5cm 11cm
  • 18. Find the AreaA=LxW 12 cm4cm
  • 19. AssessmentCompute the area, go tohttp://www.mathgoodies.com/lessons/vol1/area-triangle-part3.htmlCompute the perimeter and area of shapes, go tohttp://www.mathgoodies.com/lessons/vol1/perim_part3.html
  • 20. Resourceshttp://www.helpingwithmath.com/printables/worksheets/geo0601area02.htmhttp://www.mathgoodies.com/lessons/vol1/area-triangle-part2.htmlhttp://www.michigan.gov/documents/mde/3rd_Math_357689_7.pdfhttp://office.microsoft.com/en-us/images/?CTT=97