Draw the figure. Triangle ABC has two adjacent sides, AB and AC, that are equal in length. The angles that are opposite these sides, angles B and C, are also equal. One common triangle that has two equal sides is the 45 : 45 : 90 triangle. If angles B and C were both 45 degrees, then their sum would be 90 and the answer would be (C). However, you know nothing about the third side of the triangle, so it is possible that this is equal as well, which creates an equilateral triangle with angles of 60. The sum of the angles in Quantity A is now 120. You cannot determine which is greater, so the answer is (D).