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Lesson 12-1

I can identify and use 3-dimensional figures. Lesson 12-1. solid. flat surfaces. polygons. surface. 5 faces. segment. 2 faces. 8 edges. 2 or more. intersection. 5 vertices. 2. parallel. congruent. 2. parallel. congruent. 1. base. point. vertex. shape. base(s).

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Lesson 12-1

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  1. I can identify and use 3-dimensional figures Lesson 12-1

  2. solid flat surfaces polygons surface 5 faces

  3. segment 2 faces 8 edges 2 or more intersection 5 vertices

  4. 2 parallel congruent 2 parallel congruent 1 base point vertex shape base(s)

  5. Rectangular prism Pentagonal pyramid

  6. Triangular prism Trapezoidal prism

  7. Pentagonal prism Square pyramid

  8. ∆ABC , ∆DEF ABED, BEFC, ADFC AB BC CA DE EF FD BE CF AD A, B, C, D, E, F

  9. ABCDE ∆AEF , ∆EDF , ∆DCF , ∆CBF , ∆BAF CF AB BC CA BF AF EA DF EF DE A, B, C, D, E, F

  10. parallel bases circles circular base vertex

  11. plane Cross section = slice circle

  12. Example 3:Identify the shape of the cross section of each solid. a. b. circle triangle

  13. Example 4:Draw a cross section parallel to the base of each solid. Then identify its shape. a. b. square circle

  14. ASSIGNMENT 12-1 worksheet

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