- Angle sum of polygon
Angle sum of $n$-gon $=(n-2)\times180^\circ$
- The sum of all exterior angle of polygon
The sum of all exterior angle of $n$-gon $=360^\circ$
Resources for HKDSE Mathematics
Resources for HKDSE Mathematics
Angle sum of $n$-gon $=(n-2)\times180^\circ$
The sum of all exterior angle of $n$-gon $=360^\circ$
