In the triangle, does
Statement (1) BY ITSELF is sufficient, but statement (2) by itself is not sufficient.
Statement (2) BY ITSELF is sufficient,
but statement (1) by itself is not sufficient.
Both statements TAKEN TOGETHER
are sufficient, but NEITHER statement BY ITSELF is sufficient.
EACH statement BY ITSELF is sufficient.
The two statements TAKEN TOGETHER are NOT
Sufficient.
Countinue
Focus
on the question stem.
Did you recognize that the stem is asking whether or not the triangle
is a right triangle? Diagrams in Data Sufficiency are not drawn to scale
unless so specified. Do not use the diagram to answer the question. Use
the statements.
Evaluate
each statement separately.
Statement (2) is shorter so begin there. Knowing that 
does not give you enough information to tell us the value of either of the other two angles, so we can't know whether this is a right triangle. The
statement is insufficient, so eliminate Choices (B) and (D).
Statement (1) is sufficient.
If 
then
Therefore, 
,
which means that we have a right triangle.
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