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Question

Match the following polygons with their respective sum of internal angles.

A
1800
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B
3600
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C
5400
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D
7200
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Solution

We know that,
For any polygon, sum of interal angles
=(n2)×1800
[Where n= total number of sides]

Now,
Triangle has 3 sides. So, sum of all internal angles
=(n2)×1800
=(32)×1800
=1800

Pentagon has 5 sides. So, sum of all internal angles
=(n2)×1800
=(52)×1800
=5400

Hexagon has 6 sides. So, sum of all internal angles
=(n2)×1800
=(62)×1800
=7200

Quadrilateral has 4 sides. So, sum of all internal angles
=(n2)×1800
=(42)×1800
=3600


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