关于毕达哥拉斯定理证明的论文(13)

大学选修课论文有这个的参考下吧

11. Greater than the horns of the right Angle called obtuse Angle. 12. Less than the right Angle called acute Angle 13. The boundary is the edge of the object

14. The figure is a boundary or surrounded by several boundary

15. Round: by a line of surrounded by the plane figure, it is a little and the line any point joined the line are equal.

16. The point (refers to the definition of the points mentioned in 15) called circle.

17. Circle diameter is any a circular straight after the two direction was round intercepts line, and the round two parts.

18. Semicircle is diameter and was it the circular arc of the cutting that surrounded the graphics, semicircle circle and the same circle.

19. Linear form is surrounded by line. Trilateral form by three straight line is surrounded, quadrilateral by four straight lines is surrounded, polygons by more than four straight line is surrounded.

20. In the shape of 3, 3 sides equal, called an equilateral triangle; Only two edges equal, called an isosceles triangle; The edge of the range, called not an equilateral triangle.

21. In addition, in the shape of the trilateral, have a right Angle is, is called a right triangle; Have a Angle is the nails, the nails called triangle; The edge of the range, called not an equilateral triangle.

22. In the quadrilateral, tote is equal and four Angle is the Angle, is called a square; Angle is a right Angle, but quadrilateral not all equal, called the rectangle; Four equal, but not the right Angle, called diamond; Diagonal is equal and opposite sides equal, but not all equal and edge horn is not the right Angle, called the inclined square; The rest of the quadrilateral called irregular quadrilateral.

23. Parallel lines are in the same plane introverted ends extend unlimited cannot at the intersection of straight line. 0