# data[].attributes.headline
Relation between Interior angle and exterior angles  of a polygon

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Relation between Interior angle and exterior angles  of a polygon

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What is the Relation of an Exterior Angle of a Triangle with its Interior Angles? | Don't Memorise

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Sum of interior angles of a quadrilateral 

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Sum of interior angles of a quadrilateral 

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(n-2)x180. (where n is the number of sides)
A quadrilateral has 4 sides.
(4-2)x180
=2x180
=360
Therefore, sum of all angles of a quadilateral is 360 degrees.

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What is the Sum of Angles of a Quadrilateral? | Don't Memorise

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In geometry, an angle of a polygon is formed by two sides of the polygon that share an endpoint. For a simple (non-self-intersecting) polygon, regardless of whether it is convex or non-convex, this angle is called an interior angle (or internal angle) if a point within the angle is in the interior of the polygon

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Sum of interior angles of a polygon | Angles and intersecting lines | Geometry | Khan Academy

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Easy way to dig even further into the topic

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Easy way to dig even further into the topic

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An investigation of the sum of the interior angles of a polygon.

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See, how easy it is to learn by these methods. Maths is not boring anymore