The angle opposite side RT = 12 will have the smallest measure
The smallest internal angle possible for a regular polygon is 60 degrees. So either the angle is not 12 degrees or it is not an internal angle.
116 degrees
Exterior angle: 360/12 = 30 degrees Interior angle: 180-30 = 150 degrees
Its exterior angle is 12 degrees and it will have 360/12 = 30 sides
Exterior angle: 12 degrees Interior angle: 168 degrees
It is angle RST.
The smallest internal angle possible for a regular polygon is 60 degrees. So either the angle is not 12 degrees or it is not an internal angle.
116 degrees
180 degrees( 12-2)=1800degrees This is the sum of the interior angles. So divide 1800 by 12 and have the measure of each angle.
78
90-78 = 12 degrees
Providing that it is a regular polygon then each exterior angle will measure 12 degrees
0 degrees
This is what is called basic geometry, usually for 8th or 9th graders. When one is this age, there will be a text book that explains these things. I suggest you..look..it...up.
Exterior angle: 360/12 = 30 degrees Interior angle: 180-30 = 150 degrees
For the 12-sided polygon, each exterior angle is 30 degrees (360/12).
Its exterior angle is 12 degrees and it will have 360/12 = 30 sides