tolong kerjakan no 22 pakai cara

k persegi pnjg= 2 x (14+20)= 2 x 34 = 68 cm.
k ½ lingkaran= ½ x 22/7 x 14= 22 cm.

k bangun tersebut= 68+22= 90 cm.

a. cari keliling persegi panjang
K = 2(P+L)
K = 2(20+14)
K = 2(34)
K = 68 cm

b. cari keliling setengah lingkaran
K = 1/2×2×22/7×r
K = 1×22/7×7
K = 1×22/7×7
K = 1×(22×7)/7
K = 1×154/7
K = 1×22 = 22cm

c.keliling bangun tersebut
= 68 - 22
= 46 cm
*jwbnnya gk ad klo sesuai plhnnya