As with the case with Duke University's calendar, it is also common for there to be two months that differ due to the short number of days. In the case of Duke, June and July are slightly adjusted so the fiscal year can always begin on July 1 and end on June 30.
Let's review. A postulate is a statement accepted to be true without proof. Some common algebraic properties are also postulates and deal with the four operations: addition, subtraction, multiplication, and division. Other true statements are geometric postulates and include the ruler, angle addition, and segment addition postulates.
ASA Postulate (Angle-Side-Angle). If two angles and the included side of one triangle are congruent to the corresponding parts of another triangle, then the triangles are congruent. In a sense, this is basically the opposite of the SAS Postulate. The SAS Postulate required congruence of two sides and the included angle, whereas the ASA Postulate requires two angles and the included side to be congruent. An illustration of this postulate is shown below.