tolong di bantu ya :)

a. K 1/2 lingkaran
= 1/2 π d
= 1/2. 22/7 . 14
= 22 cm
b.
K1 = 2 (p+l)
= 2 (12 + 9)
= 2 (21)
= 42 cm
K2 = 1/2 π d
= 1/2 . 3,14 . 9
= 14,13 cm
K total = 42 + 14,13
= 56,13 cm