keliling bangun yg diasir aalah

Bangun Datar

K 1/2 lingkaran besar = 1/2 x π x d
= 1/2 x 22/7 x (7 x 3)
= 1/2 x 22/7 x 21
= 1/2 x 22 x 3
= 11 x 3
= 33 cm

K 1/2 lingkaran kecil = 1/2 x π x d
= 1/2 x 22/7 x (7 x 2)
= 1/2 x 22/7 x 14
= 1/2 x 22 x 2
= 11 x 2
= 22 cm

K bangun = 33 + 22 + 7
= 62 cm (B).

*semoga membantu. sukses selalu ^_^