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Mathematics
Problem
△
D
E
F
\triangle DEF
△
D
E
F
is congruent to
△
F
G
H
\triangle FGH
△
F
G
H
, and
△
F
G
H
\triangle FGH
△
F
G
H
is congruent to
△
H
D
E
\triangle HDE
△
H
D
E
. How many distinct sets of equal side lengths are formed among all three triangles? a)
1
1
1
b)
2
2
2
c)
3
3
3
d)
6
6
6
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