bel
8. L daerah yang diarsir = 2 (1/2 x 10 x 10) = 100cm²
9. L1/2lingk1 = 1/2 r² = 1/2 x 22/7 x 14 x 14 = 11 x 2 x 14 = 308cm² L1/2lingk2 = 1/2 x 3,14 x 10 x 10 = 157cm² L1/2lingk3 = 1/2 x 3,14 x 4 x 4 = 25,12cm² Lyg diarsir = 308 - 157 - 25,12 = 125,88
9. L1/2lingk1 = 1/2 r²
= 1/2 x 22/7 x 14 x 14
= 11 x 2 x 14 = 308cm²
L1/2lingk2 = 1/2 x 3,14 x 10 x 10 = 157cm²
L1/2lingk3 = 1/2 x 3,14 x 4 x 4 = 25,12cm²
Lyg diarsir = 308 - 157 - 25,12 = 125,88