While the lake is the largest man-made lake around, some say it is not the state's largest lake, because some of it is in Ohio. The dam that formed the lake on the Shenango River was completed in 1934. The largest man-made lake built by the Army Corps of Engineers in Pennsylvania is Raystown Lake.
postulate (plural postulates) 1  Something assumed without proof as being self-evident or generally accepted, especially when used as a basis for an argument. 2  A fundamental element; a basic principle. ( 3 logic) An axiom. 4  A requirement; a prerequisite.
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.