Bunuel wrote:
If quadrilateral ABCD is a parallelogram, is quadrilateral ABCD a square?
(1) All sides of ABCD have the same length.
(2) All angles have the same measure.
Statement 1:
All sides of ABCD have same length but do they have same angle? Insuff
Statement 2:
All angles have the same measure but do they have the same length? It can be a rectangle. Insuff
Combining 1&2:
ABCD has sides with same angle and lengths. Hence its a square.
+1 for C
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93% (00:32) correct 
