Its interior angles add up to 1800 degrees
Exterior angles: 360 degrees Interior angles: 1620 degrees
90 x ((2 x 12) - 4) degrees ie 1800o
The interior angles of an 11-gon add up to 1620 degrees
A 9-gon is a polygon with nine sides and nine angles
The interior angles of a 12-gon add up to 1800 degees
12
Measures of what? The interior angles, the exterior angles, the lengths of sides?
Its interior angles add up to 1800 degrees
It has 18 interior angles.
100
1800 degrees
A 12-gon has 12 sides.
NONE
23 of them.
where n = number of sides total sum of interior angles: (n - 2) * 180 so (12-2)*180
180x28 is the sum of the interior angles in a 30- gon