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  1. Chapter 3 Class 8 Understanding Quadrilaterals
  2. Serial order wise
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Ex 3.1, 1 Given here are some figures. Classify each of them on the basis of the following. (a) Simple Curve : A curve which does not cross itself is a simple curve. Figures (1), (2), (5), (6), and (7) are Simple Curves. Ex 3.1, 1 Given here are some figures. Classify each of them on the basis of the following. (b) Simple Closed Curve : A curve which does not cross itself and is closed is a simple closed curve Figures (1), (2), (5), (6), and (7) are Simple closed Curves. Ex 3.1, 1 Given here are some figures. Classify each of them on the basis of the following. (c) Polygon: A Simple Closed Curve made up of only line segments is a Polygon Figures (1) and (2) are PolygonsFigures (1) and (2) are PolygonsIn a Convex Polygon, no part of their diagonals is in the exterior Figures (2) is a Convex Polygon. Ex 3.1, 1 Given here are some figures. Classify each of them on the basis of the following. (e) Concave polygon In a Concave Polygon, diagonals can be in the exterior Figure (1) is a concave Polygon

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.