
What is the formula for finding the exterior and the interior angles of a polygon?
Answer
458.7k+ views
Hint: We will use the formula for finding the sum of the interior angles of a polygon to find each interior angle. We can use the fact that the sum of the interior angle and the exterior angle is Also, we know that the sum of the exterior angles is equal to
Complete step by step solution:
Suppose that we are given a polygon of sides. Then we can find the sum of interior angles of the polynomial by the formula
We usually use division to find the value of a single object when the value of a number of objects is given.
So, to find each interior angle, we need to divide the sum of the interior angles by the number of sides.
So, the interior angle of a polygon can be found by
Let us suppose that we are given a polygon with an interior angle is
We have already learnt that the sum of the exterior angle and the interior angle is equal to
So, if we represent the exterior angle by we will get
So, from this we will get the value of exterior angle by
We can also find the interior angle using another method. Because, we know that the sum of exterior angles is equal to
So, we can find each exterior angle by
Hence the interior angle of a polygon is and the exterior angle is
Note: We know that the sum of interior angles of a triangle is equal to Suppose that we are given a polygon of sides. If we draw diagonals from each side of the polygon, we will get triangles. So, the sum of interior angles of a polygon is equal to
Complete step by step solution:
Suppose that we are given a polygon of
We usually use division to find the value of a single object when the value of a number of objects is given.
So, to find each interior angle, we need to divide the sum of the interior angles by the number of sides.
So, the interior angle of a polygon can be found by
Let us suppose that we are given a polygon with an interior angle is
We have already learnt that the sum of the exterior angle and the interior angle is equal to
So, if we represent the exterior angle by
So, from this we will get the value of exterior angle by
We can also find the interior angle using another method. Because, we know that the sum of exterior angles is equal to
So, we can find each exterior angle by
Hence the interior angle of a polygon is
Note: We know that the sum of interior angles of a triangle is equal to
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