# Ex 3.1, 2 - Chapter 3 Class 8 Understanding Quadrilaterals

Last updated at Aug. 4, 2018 by Teachoo

Last updated at Aug. 4, 2018 by Teachoo

Transcript

Ex 3.1, 2 How many diagonals does each of the following have? (a) A convex quadrilateral Diagonal is a line joining two non-consecutive vertices of a Polygon ABCD is a Convex quadrilateral as its diagonal is in the interior. It has 2 diagonals - AC and BD Ex 3.1, 2 How many diagonals does each of the following have? (b) A regular hexagon Diagonal is a line joining two non-consecutive vertices of a Polygon ABCDEF is a regular hexagon. AC, AD, AE BF, BE, BD CA, CF, CE DB, DA, DF EA, EB, EC FB, FC, FD Thus, Regular Hexagon has 9 diagonals AE, AD, AC, BF, BE, BD, CF, CE, DF Ex 3.1, 2 How many diagonals does each of the following have? (c) A triangleDiagonal is a line joining two non-consecutive vertices of a Polygon ABC is a triangle It has 0 diagonals.

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Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.