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Math·Geometry and Trigonometry·Lines, angles, and triangles
medium
cm. Angles and each have measure .
Which additional piece of information is sufficient to prove that triangle ABC is congruent to triangle DEF?
A
The lengths of sides BC and EF are equal.
B
The lengths of sides AC and DF are equal.
C
The measures of angles B and C are equal.
D
No additional information is necessary.