¶ 2001 AMC 10 Problem 5
Problem:
How many of the twelve pentominoes pictured below have at least one line of symmetry?
Answer Choices:
A.
B.
C.
D.
E.
Solution:
Exactly have at least one line of symmetry. They are:
Answer: .
The problems on this page are the property of the MAA's American Mathematics Competitions