hitunglah keliling daerah yang diarsir pada gambar berikut beserta caranya

g)
K = 4 x 1/4 x phi x d
K = 22/7 x 7
K = 22cm

h)
K1 = 2 x 1/4 x phi x d
= 1/2 x 22/7 x 14
= 22cm
K2 = 2 x 1/4 x phi x d
= 1/2 x 22/7 x 28
= 44cm
K1 + K2
= 22cm + 44cm = 66cm

i)
d = 5cm
K = 4 x 1/2 x phi x d
K = 2 x 3,14 x 5
K = 31,4cm

j)
d = 7cm
K = 4 x 1/2 x phi x d
K = 2 x 22/7 x 7
K = 44cm

g. 1 / 4 x 4 = 1
22 / 7 x 7/2 x 7/2 = 38.5cm²
7 x 7 = 49cm²
49 cm² - 38.5cm² = 10.5 cm²
h. 2 x 1/4 = 1/2
22/ 7 x 1/2 x 7 x 7 = 77cm²
11/ 7 x 14 x 14 = 308 cm²
308 + 77 = 385cm²
21 x 21 = 441 cm ²
441 - 385 = 56 cm²
i. 1/2 x 4 = 2
2 x 3.14 x 2.5 x 2.5 = 39.125cm ²
5 x 5 = 25 + 39.125 = 64.125cm²
j. dua lingkaran di samping di pindahkan ke atas dan bawah, membentuk segi empat
14/ 4 = 3.5 cm x 2 = 7 cm
7 cm x 7cm
= 49cm²