If a regular polygon has 54 diagonals, what is the measure of each interior angle of the polygon?
If a regular polygon has 12 sides, then the measure of its each interior angle is ___.
If each interior angle of a regular polygon measures 140∘; the polygon has ___ sides.
Each interior angle of a regular polygon is 144°. The measure of each interior angle of a regular polygon which has double the number of sides as the first polygon is