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It will have: (3420+360)/180 = 21 sides

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Q: How many sides does a polygon have if the sum of the interior angles is 3420?
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the interior angle of a polygon with 21 sides?

So, the Sum of the interior angles for a 21 – sided polygon is equal to 3420°.


What is the sum of the interior angle measures of a 21-sided polygon?

The sum of the interior angles of a polygon is 2n - 4 right angles where n is the number of sides. When n = 21 then 2n - 4 = 42 - 4 = 38 right angles = 38 x 90 = 3420°. NOTE : If the polygon is a regular polygon then each interior angle measures 3420 ÷ 21 = 162.86°.


What is the sum of the interior angles of a 21 gon?

The sum of the interior angles of any regular polygon of n sides is equal to 180(n - 2) degrees. 3420 degrees


What would be the interior angle of a 31 sides polygon?

That would depend if it's a regular or an irregular polygon but in both cases all the interior angles add up to 3420 degrees


What type of polygon has the sum interior angles of 3420?

The sum of angles of a regular polygon: (n - 2)180 = 3,420 180n - 360 = 3,420 add 360 to both sides; 180n = 3,780 divide both sides by 180; n = 21 Thus a 21-side regular polygon has the sum of interior angles 3,420 degrees.


What is the sum of the interior angles of a polygon with 21 sides?

(n-2)*180 degrees where n is the number of sides. In this case, n = 21 so 19*180 = 3420 degrees.


What is the sum of the interior angles of a 21 sided polygon?

180*(21-2) = 180*19 = 3420 degrees.


What is the sum of the interior of an icosikaihenagon?

The sum is 3420 as the equation for every regular polygon is (n-2)*180 when n is number of sides


What is the name of a polygon that has 3420 degrees in it?

It will have 21 sides or a 21-gon


Find the sum of the measures of the interior angles of a 21-gon?

it equals to 3420 degrees


What is the total sum of its interior angles of a polygon that has 189 diagonals showing work?

Using the diagonal formula when n is number of sides :- If: 0.5*(n^2-3n) = 189 Then multiplying both sides by 2 and subtracting both sides by 2*189 So: n^2-3n-378 = 0 Solving the above quadratic equation gives n a positive value of 21 Sum of interior angles: (21-2)*180 = 3420 degrees


What is the sum of angles in a 21 sided polygon?

sum_of_interior_angles = (number_of_sides - 2) x 180° → if number_of_sides is 21: sum = (21 - 2) x 180° = 19 x 180° = 3420°