2001 AMC 10 Problems/Problem 5: Difference between revisions
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we find <math> \boxed{\textbf{(D)}\ 6} </math> pentominoes. | we find <math> \boxed{\textbf{(D)}\ 6} </math> pentominoes. | ||
== | == See Also == | ||
{{AMC10 box|year=2001|num-b=4|num-a=6}} | |||
Revision as of 12:35, 16 March 2011
Problem
How many of the twelve pentominoes pictured below at least one line of symmetry?
Solution
Here is the picture: http://www.artofproblemsolving.com/Forum/download/file.php?id=6659&&mode=view
The ones with lines over the shapes have at least one line of symmetry. Counting the number of shapes that have line(s) on them,
we find 
pentominoes.
See Also
| 2001 AMC 10 (Problems • Answer Key • Resources) | ||
| Preceded by Problem 4 |
Followed by Problem 6 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | ||
| All AMC 10 Problems and Solutions | ||
