1977 AHSME Problems/Problem 2

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Problem 2

Which one of the following statements is false? All equilateral triangles are

$\textbf{(A)}\ \text{ equiangular}\qquad \textbf{(B)}\ \text{isosceles}\qquad \textbf{(C)}\ \text{regular polygons }\qquad\\ \textbf{(D)}\ \text{congruent to each other}\qquad \textbf{(E)}\ \text{similar to each other}$


Solution

Solution by e_power_pi_times_i

Equilateral triangles can be in different sizes, therefore they are not $\boxed{\textbf{(D)}\ \text{congruent to each other}}$