A curve is said to be simple if it does not cross itself
(a) Simple curve → 1,2,5,6,7
A simple closed curve is that curve which forms a path which starts and ends at the same point
(b) Simple closed curve → 1,2,5,6,7
A polygon is a two dimensional closed figure which consists of sides and vertices
(c) Polygon → 1,2
A polygon in which the measure of each interior angle is less than 180° is called as a convex polygon
(d) Convex polygon → 2
A polygon in which the measure of one interior angle is greater than 180° is called as a concave polygon
(e) Concave polygon → 1