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The number of sides of a regular polygon whose each interior angle is of 135° is ______. - Mathematics

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Question

The number of sides of a regular polygon whose each interior angle is of 135° is ______.

Options

  • 6

  • 7

  • 8

  • 9

MCQ
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Solution

The number of sides of a regular polygon whose each interior angle is of 135° is 8.

Explanation:

We know that, the measures of each exterior angle of a polygon having n sides is given by `360^circ/n`.

∴ The number of sides,

`n = 360^circ/"Exterior angle"`

= `360^circ/(180^circ - 135^circ)`   ...[∵ Exterior angle + Interior angle = 180°]

= `360^circ/45^circ` 

= 8

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Chapter 5: Understanding Quadrilaterals and Practical Geometry - Exercise [Page 150]

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NCERT Exemplar Mathematics [English] Class 8
Chapter 5 Understanding Quadrilaterals and Practical Geometry
Exercise | Q 49. | Page 150

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