Euclidean geometry equal (SAS), or two angles and a side equal (ASA) (Book I, propositions 4, 8, and 26). Triangles with three equal angles (AAA) are similar, but not necessarily congruent. Also, triangles with two equal sides and an adjacent angle are not necessarily equal or congruent. The sum of the angles of a triangle is equal to a straight angle (180 degrees). This causes an equilateral triangle to have three interior angles of 60 degrees. Also, it causes every triangle to have at least two acute angles and up to one obtuse or right angle. The celebrated Pythagorean theorem (book I,
What Is the Third Estate? estates of the clergy and aristocracy. Sieyès stated that the people wanted genuine representatives in the Estates-General, equal representation to the other two orders taken together, and votes taken by heads and not by orders. These ideas came to have an immense influence on the course of the French Revolution. The pamphlet is organized around three hypothetical questions and Sieyès' responses. The questions and responses are: Throughout the pamphlet, Sieyès argues that the first and second estates are simply unnecessary, and that the Third Estate is in truth France's only legitimate estate, representing as it does the entire population. Thus,