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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
How many triangles are formed by the diagonals in a 21 sided polygon?
The number of triangles formed by the diagonals of a 21 sided polygon is C(21,3) = 21x20x19/3x2x1 = 1,330.
If a regular polygon has exterior angles that measures approximately 17.14 degrees how many sides does it have?
No matter how many sides it has, the exterior angles of a regular polygon add up to 360 degrees. So 360/17.14 = 21 sides.
What is the name of a polygon that has 3420 degrees in it?
It will have 21 sides or a 21-gon
What is the sum of the interior angles of a 23-gon?
3,780 degrees Formula: 180(s-2) s=sides 180(23-2)=180*21=3,780
What is the sum of the exterior angles of a 21 sided polygon?
The sum of the exterior angles of any polygon, regardless of the number of sides, is always 360 degrees. Therefore, the sum of the exterior angles of a 21-sided polygon is 360 degrees.
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 a 21 sided polygon?
The name of a 21 sided polygon is Icosihenagon.
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 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 do you call a 21-sided polygon?
icosihenagon= 21-sided polygon icosihenagon= 21-sided polygon
How many angles does icosikaihenagon have?
This is a 21 sided polygon and therefore has 21 angles. NOTE : The name supplied for this polygon is an artificial name and never used in practice. General usage refers to this shape as a 21-gon.
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 are the names to polygons from 21 to 30 sides?
The names of polygons with sides ranging from 21 to 30 are as follows: a 21-sided polygon is called a icosagon, a 22-sided polygon is a dicosagon, a 23-sided polygon is a tricosagon, a 24-sided polygon is a tetracosagon, a 25-sided polygon is a pentacosagon, a 26-sided polygon is a hexacosagon, a 27-sided polygon is a heptacosagon, a 28-sided polygon is an octacosagon, a 29-sided polygon is a nonacosagon, and a 30-sided polygon is a triacontagon.
What is the size of each angle of a regular polygon with 23 sides?
The sum of the angles of a polygon is equal to 180° times (n-2) where n is the number of sides.For a 23-sided polygon, that would give a total of (180°) x (21) = 3780°. If the angles are all the same, each would be 3780° ÷ 23 = 164.3478°
21 sided polygon?
An icosikaihena is a polygon with 21 sides
Twenty one sided polygon?
The name of a 21 sided polygon is Icosihenagon.
