Polygons

Which of the following is decagon 

Identify a decagon from the following

Which of the following is nonagon

Identify a nonagon from the following

What is the sum of the measures of the interior angles of a heptagon?

If the ratio of interior angle to the exterior angle of a regular polygon is $7 : 2,$ then find the number of sides of the polygon.

Find the number of sides of a regular polygon if each of its exterior angles measures  $27\frac{9^0}{13}$

Find the number of sides of a regular polygon if each of its exterior angles measures  $12°$

Find the number of sides of a regular polygon if each of its exterior angles measures$30°$

Find the number of sides of the following polygons. if the sum of the interior angles is$2160°$ 

Find the number of sides of the following polygons. if the sum of the interior angles is  $3960°$

Find the number of sides of the following polygons. if the sum of the interior angles is$5040°$ 
  

Find the number of sides of the following polygons, if the sum of the interior angles is
$2700°$

Find the sum of Interior angles of a polygon of $47$ sides.

Find the sum of Interior angles of a polygon of $22$ sides.

Find the sum of Interior angles of a polygon of$7$sides

Find the sum of Interior angles of a polygon of $15$sides.

 Can a regular polygon be possible, whose sum of interior angles is  $6840°$

Can a regular polygon be possible, whose sum of interior angles is  $2000°$

 Can a regular polygon be possible, whose sum of interior angles is  right angles : $15$ right angles