This document discusses the key properties of polygons. It defines polygons as closed figures with more than three sides and notes they have two types of angles: internal and external. Internal angles are those within the polygon shape, while external angles are those outside the polygon shape. The document also states the sum of the internal angles of an n-sided polygon is (n-2)×180° and the sum of the external angles is always 360°.

2. ST.THOMAS TRAINING
COLLEGE
MUCKOLAKKAL

3. SUBMITTED BY
NAME: SARANYA.V.S
REGISTER NO:13 386 005
YEAR: 2013 - 2014

5.  Closed figures with more than three sides are called
polygons
A
BC
A B
D C

6.  Polygon has two types of angles.
 Two types of angles in a polygon are…
1.Internal angle
2. External angle

7.  Internal angles in a polygon are

8.  External angles in a polygon are

9.  The sum of the angles of an n sided polygon is
(n-2)X180°

10.  The sum of the external angles of a polygon is
always 360°

11. THANK YOU