sector
measurements
for arc length of a sector
area of a sector
SAS
area of SAS
cosine rule
the alternate method in SAS
sine rule
area of a shaded region
area of sector-area of triangle or
perimeter of the shaded region
AB + Arc length(S)
area of shaded region
area of sector-area of triangle
perimeter of shaded region
BC+AC+S
C=S so