(vi) A Polygon is a Convex Polygon if the line segment joining any two points inside it lies completely inside the Polygon. (v) The line segments joining the non-adjacent vertices are called the diagonals of the Polygon. (iv) The endpoints of the same side of a Polygon are known as the adjacent vertices. (iii) Any two sides of a Polygon with a common endpoint are called the adjacent sides of the Polygon. (ii) The Line segments forming a Polygon are known as its sides and their endpoints are known as the vertices of the Polygon. (b) no two-line segments with a common endpoint are coincident. (a) no two-line segments intersect except at their endpoints. (i) A Polygon is a closed curve formed by the line segments such that: (ii) A Curve which does not cut itself is called an Open Curve and a Curve which cuts itself is called a Closed Curve. Then the pictures obtained because of doodling are called Curves. (i) If we take a piece of paper and it is just doodled. (iv) The line segment A B is the same as the line segment B A. (iii) There is a unique line segment joining two given points A and B. (ii) A line segment has two endpoints, and a line has no end points. The points A and B are called the endpoints of this segment. If A and B are two points in a plane, the part AB of the line through A and B is called a line segment AB. (i) A line segment is a portion of a line. If they intersect, they intersect in a line. (iii) Two planes either intersect or are parallel. (ii) Two lines in a plane either intersect at exactly one point or are parallel. (i) Plane is a flat smooth surface which extends indefinitely in all directions. (vi) Three or more lines are concurrent if all of them pass through the same point which is called their point of concurrence. (v) Three or more points are collinear if all of them lie on the same line. (iv) Exactly one line passes through two different given points in a plane and it lies wholly in that plane. (iii) An unlimited number of lines can be drawn through a given point. (ii) Line is straight and extends indefinitely in both directions. It occupies a position, and its location can be ascertained.
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