Regular Polygons

• A 4 sided polygon has 90 degree exterior angles, 90 degree interior angles and 360 degrees is the sum of interior angles
• A 5 sided polygon has 72 degree exterior angles, 108 degree interior angles and 540 degrees is the sum of interior angles
• A 6 sided polygon has 60 degree exterior angles, 120 degree interior angles and 720 degrees is the sum of interior angles
• A 7 sided polygon has 51 2/7 degree exterior angles, 128 4/7 degree interior angles and 900 degrees is the sum of interior angles
• An 8 sided polygon has 45 degree exterior angles, 135 degree interior angles and 1080 degrees is the sum of interior angles
• A 9 sided polygon has 40 degree exterior angles, 140 degree interior angles and 1260 degrees is the sum of interior angles
• A 10 sided polygon has 36 degree exterior angles, 144 degree interior angles and 1440 degrees is the sum of interior angles
• A 12 sided polygon has 30 degree exterior angles, 150 degree interior angles and 1800 degrees is the sum of interior angles