tolong kak nomer 2. A,B,C mksi

a. lebar = 128 : 16 = 8 cm
. keliling = (8+16) * 2 = 48 cm
b. lebar = 147 : 21 = 7 cm
. keliling = (7+21) * 2 = 56 cm
c. panjang = 60 - (11*2) /2 = 19 cm
. luas = 19*11 = 209 cm2