Geometry Practice Test 6

Question : 26 of 39

Marks: +1, -0

In a polygon, the sum of the interior angles is double the sum of the exterior angles. The number of sides is:

Solution:

The sum of interior angles and exterior angles in regular polygon = 180°
I + E = 180°
Given condition is:
I = 3 E
E + 3 E = 180°
4E = 180°
E = 45°
Number of sides in the regular polygon
=

{360°}/{45°}

= 8 sides

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