Sector area formula =3. 14 16* radius * central angle /360=0.5* arc length * radius.
Conversion formula between area and arc length: arc length = area /(0.5* radius)
The developed formula of arc length of conical profile =2* base circle radius *3. 14 16= conical profile length *2*3. 14 16* sector central angle /360.
Lateral area formula of cone = cone side length * cone side length *3. 14 16* sector central angle /360.
Formula of total area of cone = = cone side length * cone side length *3. 14 16* sector central angle /360+ bottom radius *3. 14 16.