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10.4 And 10.5

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Transcript

  • 1. 10.4 Triangles 10.5 Quadrilaterals Identify and Classify Triangles and Quadrilaterals
  • 2. P 428 Hands-on Mini Lab First—Watch the demonstration
    • Use a straightedge to draw a triangle with three acute angles. Label the angles A, B, and C. Cut out the triangle.
    • Fold angle B so that its vertex touches the line between angles A and C. The fold should be parallel to the base of the triangle.
    • Fold angle A and angle C so the vertices meet.
  • 3. Questions for mini lab
    • What kind of angle is formed where the three vertices meet?
    • Repeat the activity with another triangle.
    • Make a conjecture about the sum of the measures of three angles of any triangle.
  • 4. A triangle has ___ angles. The angles add to give you ____. 1 2 3
  • 5. Find x 32 ° x 64 °
  • 6. Bermuda Triangle
  • 7. P 428 example 1
  • 8. p 429 example 2
  • 9. An airplane has winds that are shaped like triangles. Find the missing measure.
    • (In class example 1)
  • 10. In class example 2
  • 11. Properties of triangles video
  • 12. In groups talk about the four types of triangles mentioned in the video.
  • 13. Classify by ANGLES Acute Triangle Right Triangle Obtuse Triangle ____ angles are _______ 90 ° ____angles are _______ 90° ____angles are _______ 90°
  • 14. Classify by Sides Scalene Triangle Isosceles Triangle Equilateral Triangle ____ congruent sides ____ congruent sides ____ congruent sides
  • 15. Classify the triangle by its angles and by its sides
  • 16. Classify the triangle by its angles and by its sides
  • 17. Classify the triangle by its angles and by its sides
  • 18. Classify the triangle by its angles and by its sides
  • 19. P 429 example 3 and 4
  • 20. Workbook 10-4
  • 21.
    • Turn and Talk
    • What does quad mean?
    • What is a quadrilateral?
    10-5 Quadrilaterals
  • 22. Quadrilateral Parallelograms Trapezoid Rectangle Rhombus Square
  • 23. Classify the quadrilateral using the name that best describes it.
  • 24. Classify the quadrilateral using the name that best describes it.
  • 25. Quadrilateral Video
  • 26. Classify the quadrilateral using the name that best describes it.
  • 27. Classify the quadrilateral using the name that best describes it.
  • 28. Angles
    • Divide the parallelogram into 2 triangles.
    • What is the sum of angles in both triangles?
    • Then what is the sum of angles in the parallelogram?
  • 29. P 435: example 3
  • 30. In class example 3
  • 31. More examples from workbook
  • 32. Quadrant Card—Fill in the top 2 quadrants. Then exchange with a partner and fill in the bottom 2. Draw a picture and name the quadrilateral described above. Draw a picture and name the triangle described above. Without giving it’s name, describe one type of quadrilateral. Without giving it’s name, describe one type of triangle.
  • 33. Homework
    • p 430: 2, 5-23 and p 435: 4-6, 10-23
    • DUE FRIDAY!!!

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