luas bagian lingkaran disamping adalah

1/ 2 × pi ×r^2= 1/2 ×3,14×(10,5)^2 =( 3,14 ×110,15)/2 = 346,185/2=173,0925
jawaban c

L = pr² = 3,14x110,25 = 346,85 cm²
= 346,85 : 4 x 2
= 86,7125x2 = 173,25 cm²