Answer:
32cm
Explanation:
Perimeter of the sector =AC+BC+arc AB
AC=BC=radius=10.5 cm
Length of the arc of the sector with central angle, θ (in degree) is =
360
θ
×2πr
So, length of the arc AB=
360
60
×2π×(10.5)
=
3
1
×
7
22
×(10.5)
=11 cm
Perimeter of the sector =10.5+10.5+11=32 cm