Transcript Describe the cross section.

11-1 Space Figures and Cross
Sections
To recognize polyhedra and their parts
To visualize cross sections of space figures
With Euler’s Formula, students will decontextualize threedimensional figures, reducing them to numeric values of their
faces, edges, and vertices, as well as contextualize, pausing to
consider the numeric values in terms of their original referents.
6 Vertices: R, S, T, W, U, V
2a. 12
2b. 30
11-1 Quiz
• The following questions are designed to help you
determine how well you understood today’s lesson.
• Please take time to ask questions if you miss one
and don’t know why!
• Record the number you get right on your portfolio
sheet 
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1. Use Euler’s Formula to find the missing number.
Faces: 25
A. 43
Vertices: 17
B. 41
Edges: ?
C. 40
D. 39
Non-Response
Grid
2. Use Euler’s Formula to find the missing number.
Vertices: 11
A. 25
Edges: 34
B. 28
Faces: ?
C. 26
D. 24
Non-Response
Grid
3. Use Euler’s Formula to find the missing number.
Edges: 29
A. 13
Faces: 17
B. 14
Vertices: ?
C. 15
D. 17
Non-Response
Grid
4. Mario’s company makes unusually shaped imitation
gemstones. One gemstone had 12 faces and 10 vertices.
How many edges did the gemstone have?
A.
B.
C.
D.
23 edges
22 edges
25 edges
20 edges
Non-Response
Grid
5. Describe the cross section.
A.
B.
C.
D.
pentagon
trapezoid
hexagon
cube
Non-Response
Grid
ASSIGNMENT
•11-1 p.692-694
#6-38 even
Be sure to RATE your understanding of the
lesson 4-3-2-1-0 after you finish it AND give me
one complete sentence as to why you rated
yourself that way then summarize what the
lesson was about in a sentence or two.
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