- Sum of exterior angles = 360°
- Interior angle + Exterior angle = 180°
- Exterior angle = 360° ÷ n
- Sum of interior angles = 180° x (n - 2)
Table:
- n=3: Exterior Angle=120°, Interior Angle=60°, Sum of Interior Angles=180°
- n=6: Exterior Angle=60°, Interior Angle=120°, Sum of Interior Angles=720°
- n=20: Exterior Angle=18°, Interior Angle=162°, Sum of Interior Angles=3240°
- n=9: Exterior Angle=40°, Interior Angle=140°, Sum of Interior Angles=1260°
- n=8: Exterior Angle=45°, Interior Angle=135°, Sum of Interior Angles=1080°
- n=5: Exterior Angle=72°, Interior Angle=108°, Sum of Interior Angles=540°
- n=12: Exterior Angle=30°, Interior Angle=150°, Sum of Interior Angles=1800°
- n=4: Exterior Angle=90°, Interior Angle=90°, Sum of Interior Angles=360°
- n=10: Exterior Angle=36°, Interior Angle=144°, Sum of Interior Angles=1440°
- n=15: Exterior Angle=24°, Interior Angle=156°, Sum of Interior Angles=2340°
Parent Tip: Review the logic above to help your child master the concept of angles of polygons worksheet.
