
An exterior angle of a regular polygon is 15 degrees. How many sides does the polygon have?
Answer
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Hint: We are given a regular polygon whose exterior angle is 15 degrees and we have to find the sides of the polygon. We know that the sum of the exterior angles of a polygon is . So, if we divide the total sum of the exterior angle of a polygon by the exterior angle, then, we will get the value of the number of sides of the polygon.
Complete step by step solution:
According to the question given to us, we are given the value of an exterior angle of a polygon. The value is 15 degrees. And using that, we have to find the number of sides of that polygon.
Polygon refers to the geometrical shape made using a finite number of straight lines and which are closed.
Example – Square, Triangle
We know that the total sum of exterior angles of any polygon is .
And if we want to know the exterior angle of any polygon, we divide by the number of sides, ‘n’ of that particular polygon.
That is, .
For example – Square has 4 sides, so the value of exterior angle is
So, if we want to find the number of sides then, we will divide by the exterior angle.
We have,
Rearranging the above equation in terms of ‘n’, we have,
Solving the above expression, we get the value as,
Therefore, the number of sides of the polygon is 24 sides.
Note: The formula used for finding the number of sides should not be confused and should be used appropriately. The calculations should be done correctly and step-wise. And also, the exterior angle should not be confused with the interior angle, both are different in every aspect.
Sum of exterior angles of any polygon is , but the sum of interior angles is different for different polygon and can be calculated by using the formula , where is the number of sides of that polygon.
Complete step by step solution:
According to the question given to us, we are given the value of an exterior angle of a polygon. The value is 15 degrees. And using that, we have to find the number of sides of that polygon.
Polygon refers to the geometrical shape made using a finite number of straight lines and which are closed.
Example – Square, Triangle
We know that the total sum of exterior angles of any polygon is
And if we want to know the exterior angle of any polygon, we divide
That is,
For example – Square has 4 sides, so the value of exterior angle is
So, if we want to find the number of sides then, we will divide
We have,
Rearranging the above equation in terms of ‘n’, we have,
Solving the above expression, we get the value as,
Therefore, the number of sides of the polygon is 24 sides.
Note: The formula used for finding the number of sides should not be confused and should be used appropriately. The calculations should be done correctly and step-wise. And also, the exterior angle should not be confused with the interior angle, both are different in every aspect.
Sum of exterior angles of any polygon is
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