A) A regular pentagon and a regular hexagon.
B) A rhombus and a square.
C) Two equilateral triangles of the same length of their sides.
D) A quadrilateral and a rectangle.
Correct Answer: C
Solution :
(c): In case (c), the two Ales satisfy both SSS criterion and the SAS criterion (as included angle is \[60{}^\circ \] in equilateral \[\Delta le\]). In fact, even one of this criterion is sufficient so, we have extraneous data (data more than what is required to solve the problem)
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