2001 AMC 10 Problems/Problem 5
Problem
How many of the twelve pentominoes pictured below have at least one line of symmetry?
Solution
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 | ||
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